Backport of gitpython-developers#118

Author: Byron

git/objects/submodule/base.py

@@ -644,7 +644,7 @@ def remove(self, module=True, force=False, configuration=True, dry_run=False):
                     num_branches_with_new_commits = 0
                     rrefs = remote.refs
                     for rref in rrefs:
-                        num_branches_with_new_commits = len(mod.git.cherry(rref)) != 0
+                        num_branches_with_new_commits += len(mod.git.cherry(rref)) != 0
                     # END for each remote ref
                     # not a single remote branch contained all our commits
                     if num_branches_with_new_commits == len(rrefs):