Change method of counting commits

The count of commits in unshallowed copy should always match the actual
number of commits in the master repository, so the is no need for
workarounds.

Signed-off-by: Przemo Firszt <przemo@firszt.eu>

package/fedora/rpkg.macros

@@ -1,5 +1,4 @@
 function git_commits_no {
-	commits_since_0_16=$(git rev-list master 0.16 --count)
-	total_commits=$((11532 + $commits_since_0_16))
-	echo $total_commits
+	commits=$(git fetch --unshallow && git rev-list master --count)
+	echo $commits
 }