gnu: emacs-benchmark-init: Don't use unstable tarball.

* gnu/packages/emacs-xyz.scm (emacs-benchmark-init)[source]: Use GIT-FETCH and
GIT-FILE-NAME.

gnu/packages/emacs-xyz.scm

@@ -10574,15 +10574,15 @@ functions.")
   (package
     (name "emacs-benchmark-init")
     (version "1.0")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "https://github.com/dholm/benchmark-init-el/archive/"
-                    version ".tar.gz"))
-              (file-name (string-append name "-" version ".tar.gz"))
-              (sha256
-               (base32
-                "0szyqr4nncwz4vd5gww1vz31kf9r2lx25p4d0d09pm35974x53kz"))))
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/dholm/benchmark-init-el.git")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1kyn1izm5sbqbp9whnhk9dn3yc7zy8bz5san5w3ivi3rpx15fh94"))))
     (build-system emacs-build-system)
     (home-page "https://github.com/dholm/benchmark-init-el")
     (synopsis "Benchmark Emacs @code{require} and @code{load} calls")