[packaging] Fix COPR building system

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

package/fedora/rpkg.conf

@@ -1,2 +1,3 @@
 [rpkg]
 auto_pack = False
+user_macros = "${git_props:root}/rpkg.macros"

package/fedora/rpkg.macros

@@ -1,4 +0,0 @@
-function git_commit_no {
-	commits=$(curl -s 'https://api.github.com/repos/FreeCAD/FreeCAD/compare/120ca87015...master' | grep "ahead_by" | sed -s 's/ //g' | sed -s 's/"ahead_by"://' | sed -s 's/,//')
-	echo -n $((commits + 1))
-}