gnu: Use full SHA1 commit ids.

* gnu/packages/bioinformatics.scm (pbtranscript-tofu, mosaik,
  smithlab-cpp, piranha): Use full SHA1 commit ids.
* gnu/packages/ci.scm (hydra): Likewise.
* gnu/packages/compression.scm (sfarkxtc): Likewise.
* gnu/packages/emacs.scm (emacs-ob-ipython): Likewise.
* gnu/packages/games.scm (mars, emulation-station): Likewise.
* gnu/packages/gnunet.scm (guile-gnunet): Likewise.
* gnu/packages/music.scm (non-sequencer): Likewise.
* gnu/packages/version-control.scm (git-flow, git-test-sequence): Likewise.
* gnu/packages/xorg.scm (xf86-video-intel): Likewise.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/bioinformatics.scm

@@ -2670,10 +2670,10 @@ the phenotype as it models the data.")
     (license license:asl2.0)))
 
 (define-public pbtranscript-tofu
-  (let ((commit "8f5467fe6"))
+  (let ((commit "8f5467fe6a4472bcfb4226c8720993c8507adfe4"))
     (package
       (name "pbtranscript-tofu")
-      (version (string-append "2.2.3." commit))
+      (version (string-append "2.2.3." (string-take commit 7)))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference
@@ -3009,7 +3009,7 @@ viewer.")
                (delete 'configure))))))))
 
 (define-public mosaik
-  (let ((commit "5c25216d"))
+  (let ((commit "5c25216d3522d6a33e53875cd76a6d65001e4e67"))
     (package
       (name "mosaik")
       (version "2.2.30")
@@ -3259,10 +3259,10 @@ subsequent visualization, annotation and storage of results.")
 
 (define-public smithlab-cpp
   (let ((revision "1")
-        (commit "728a097"))
+        (commit "728a097bec88c6f4b8528b685932049e660eff2e"))
     (package
       (name "smithlab-cpp")
-      (version (string-append "0." revision "." commit))
+      (version (string-append "0." revision "." (string-take commit 7)))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference
@@ -5169,7 +5169,7 @@ libraries for systems that do not have these available via other means.")
        ("samtools" ,samtools-0.1)
        ("gsl" ,gsl)
        ("smithlab-cpp"
-        ,(let ((commit "3723e2d"))
+        ,(let ((commit "3723e2db438c51501d0423429ff396c3035ba46a"))
            (origin
              (method git-fetch)
              (uri (git-reference

gnu/packages/ci.scm

@@ -39,10 +39,10 @@
   #:use-module (guix build-system gnu))
 
 (define-public hydra
-  (let ((commit "4c0e3e4"))
+  (let ((commit "4c0e3e47034545ad3e9e86dd069138bcebb8ccee"))
     (package
       (name "hydra")
-      (version (string-append "20150407." commit))
+      (version (string-append "20150407." (string-take commit 7)))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference

gnu/packages/compression.scm

@@ -443,16 +443,17 @@ with the sfArk algorithm.")
     (license license:gpl3+)))
 
 (define-public sfarkxtc
+ (let ((commit "b5e0a2ba3921f019d74d4b92bd31c36dd19d2cf1"))
   (package
     (name "sfarkxtc")
-    (version "b5e0a2ba39")
+    (version (string-take commit 10))
     (source (origin
               ;; There are no release tarballs, so we just fetch the latest
               ;; commit at this time.
               (method git-fetch)
               (uri (git-reference
                     (url "https://github.com/raboof/sfarkxtc.git")
-                    (commit version)))
+                    (commit commit)))
               (sha256
                (base32
                 "0f5x6i46qfl6ry21s7g2p4sd4b2r1g4fb03yqi2vv4kq3saryhvj"))))
@@ -473,7 +474,7 @@ with the sfArk algorithm.")
     (synopsis "Basic sfArk decompressor")
     (description "SfArk extractor converts SoundFonts in the compressed legacy
 sfArk file format to the uncompressed sf2 format.")
-    (license license:gpl3+)))
+    (license license:gpl3+))))
 
 (define-public libmspack
   (package

gnu/packages/emacs.scm

@@ -1238,7 +1238,7 @@ files and directories.")
     (source (origin
               (method git-fetch)
               (uri (git-reference
-                    (commit "8807064693")
+                    (commit "880706469338ab59b5bb7dbe8460016f89755364")
                     (url "https://github.com/gregsexton/ob-ipython.git")))
               (sha256
                (base32

gnu/packages/games.scm

@@ -590,11 +590,11 @@ for common mesh file formats, and collision detection.")
   ;; The latest release on SourceForge relies on an unreleased version of SFML
   ;; with a different API, so we take the latest version from the official
   ;; repository on Github.
-  (let ((commit   "c855d04409")
+  (let ((commit   "c855d044094a1d92317e38935d81ba938946132e")
         (revision "1"))
     (package
       (name "mars")
-      (version (string-append "0.7.5." revision "." commit ))
+      (version (string-append "0.7.5." revision "." (string-take commit 7) ))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference
@@ -1833,6 +1833,7 @@ emulation community.  It provides highly accurate emulation.")
     (license license:gpl2+)))
 
 (define-public emulation-station
+  (let ((commit "646bede3d9ec0acf0ae378415edac136774a66c5"))
     (package
       (name "emulation-station")
       (version "2.0.1")
@@ -1840,7 +1841,7 @@ emulation community.  It provides highly accurate emulation.")
                 (method git-fetch) ; no tarball available
                 (uri (git-reference
                       (url "https://github.com/Aloshi/EmulationStation.git")
-                    (commit "646bede"))) ; no version tag
+                      (commit commit))) ; no version tag
                 (sha256
                  (base32
                   "0cm0sq2wri2l9cvab1l0g02za59q7klj0h3p028vr96n6njj4w9v"))))
@@ -1862,7 +1863,7 @@ number of video game console emulators.  It features an interface that is
 usable with any game controller that has at least 4 buttons, theming support,
 and a game metadata scraper.")
       (home-page "http://www.emulationstation.org")
-    (license license:expat)))
+      (license license:expat))))
 
 (define openttd-engine
   (package

gnu/packages/gnunet.scm

@@ -266,10 +266,10 @@ privacy-preserving, decentralized public key infrastructure.")
    (home-page "https://gnunet.org/")))
 
 (define-public guile-gnunet                       ;GSoC 2015!
-  (let ((commit "383eac2"))
+  (let ((commit "383eac2aab175d8d9ea5315c2f1c8a5055c76a52"))
     (package
       (name "guile-gnunet")
-      (version (string-append "0.0." commit))
+      (version (string-append "0.0." (string-take commit 7)))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference

gnu/packages/music.scm

@@ -437,10 +437,10 @@ Guile.")
 (define-public non-sequencer
   ;; The latest tagged release is three years old and uses a custom build
   ;; system, so we take the last commit affecting the "sequencer" directory.
-  (let ((commit "1d9bd576"))
+  (let ((commit "1d9bd576f6bf7ea240af5f7a60260592750af0dd"))
     (package
       (name "non-sequencer")
-      (version (string-append "1.9.5-" commit))
+      (version (string-append "1.9.5-" (string-take commit 7)))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference

gnu/packages/version-control.scm

@@ -479,7 +479,7 @@ will work.")
               (method git-fetch)
               (uri (git-reference
                     (url "https://github.com/nvie/gitflow/")
-                    (commit "15aab26")))
+                    (commit "15aab26490facf285acef56cb5d61025eacb3a69")))
               (sha256
                (base32
                 "01fs97q76fdfnvmrh2cyjhywcs3pykf1dg58sy0frflnsdzs6prx"))))
@@ -513,10 +513,10 @@ lot easier.")
     (license bsd-2)))
 
 (define-public git-test-sequence
-  (let ((commit "48e5a2f"))
+  (let ((commit "48e5a2f5a13a5f30452647237e23362b459b9c76"))
     (package
       (name "git-test-sequence")
-      (version (string-append "20140312." commit))
+      (version (string-append "20140312." (string-take commit 7)))
       (source (origin
                 (method git-fetch)
                 (uri (git-reference

gnu/packages/xorg.scm

@@ -2810,10 +2810,10 @@ X server.")
 
 
 (define-public xf86-video-intel
-  (let ((commit "d167280"))
+  (let ((commit "d1672806a5222f00dcc2eb24ccddd03f727f71bc"))
     (package
       (name "xf86-video-intel")
-      (version (string-append "2.99.917-1-" commit))
+      (version (string-append "2.99.917-1-" (string-take commit 7)))
       (source
        (origin
          ;; there's no current tarball