gnu: vte-ng: Fetch source using git.

* gnu/packages/gnome.scm (vte-ng)[source]: Rewrite in terms of GIT-FETCH.

gnu/packages/gnome.scm

@@ -2117,6 +2117,13 @@ editors, IDEs, etc.")
     (name "vte-ng")
     (version "0.52.2.a")
     (home-page "https://github.com/thestinger/vte-ng")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference (url home-page) (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1csmjrw3c2avh711xcrn3khqwp4cwz97c3fmyirq2rg0hndng4s3"))))
     (native-inputs
      `(("gtk-doc" ,gtk-doc)
        ("gperf" ,gperf)
@@ -2124,14 +2131,6 @@ editors, IDEs, etc.")
        ("automake" ,automake)
        ("libtool" ,libtool)
        ,@(package-native-inputs vte)))
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "https://github.com/thestinger/"
-                                  name "/archive/" version ".tar.gz"))
-              (file-name (string-append name "-" version ".tar.gz"))
-              (sha256
-               (base32
-                "1fd65mk7c87k03vhnb2ixkjvv9nja04mfq813iyjji1b11f2sh7v"))))
     (arguments
      `(#:phases (modify-phases %standard-phases
                   (replace 'bootstrap