gnu: emacs-idris-mode: Use recent git checkout.

* gnu/packages/emacs-xyz.scm (emacs-idris-mode)[source]: Use git-fetch.
[version]: Include revision and commit.

gnu/packages/emacs-xyz.scm

@@ -8534,18 +8534,21 @@ key.  Optionally, a mouse pop-up can be added by binding
     (license license:gpl3+)))
 
 (define-public emacs-idris-mode
+  (let ((commit "acc8835449475d7cd205aba213fdd3d41c38ba40")
+        (revision "0"))
     (package
       (name "emacs-idris-mode")
-    (version "0.9.19")
+      (version (git-version "0.9.19" revision commit))
       (source
        (origin
-       (method url-fetch)
+         (method git-fetch)
-       (uri (string-append
+         (uri (git-reference
-             "http://stable.melpa.org/packages/idris-mode-"
+               (url "https://github.com/idris-hackers/idris-mode.git")
-             version ".tar"))
+               (commit commit)))
+         (file-name (git-file-name name commit))
          (sha256
           (base32
-         "16hl2s22l3wc9drnwzw6hn7xrm49ml9lii0s6k218dgahdgsncmf"))))
+           "0n9xbknc68id0mf8hbfmawi8qpvrs47ix807sk9ffv2g3ik32kk6"))))
       (build-system emacs-build-system)
       (propagated-inputs
        `(("emacs-prop-menu" ,emacs-prop-menu)))
@@ -8556,7 +8559,7 @@ key.  Optionally, a mouse pop-up can be added by binding
        "This is an Emacs mode for editing Idris code.  It requires the latest
 version of Idris, and some features may rely on the latest Git version of
 Idris.")
-    (license license:gpl3+)))
+      (license license:gpl3+))))
 
 (define-public emacs-browse-at-remote
   (package