import_srpm: don't attempt to fetch if we're not push/pulling

When we used `create_rpm_git_repo.py --local`, there may be no remote
to pull from yet.

Should indeed have been part of c2d89af.

Signed-off-by: Yann Dirson <yann.dirson@vates.tech>

Author: ydirson

scripts/import_srpm.py

@@ -54,7 +54,8 @@ def main():
 
     print(" checking out parent ref...")
 
-    call_process(['git', 'fetch'])
+    if args.push:
+        call_process(['git', 'fetch'])
     call_process(['git', 'checkout', args.parent_branch])
     if args.push:
         call_process(['git', 'pull'])