pre-push git hook will warn about fixups for no reason

$ git push github bug30076_conflict
Enter passphrase for key '/home/f/.ssh/id_rsa': 
Enter passphrase for key '/home/f/.ssh/id_rsa': 
Running pre-push hook
Found fixup! commit in refs/heads/bug30076_conflict, not pushing
If you really want to push this, use --no-verify.

My pre-push hook does not allow me to push a branch even tho it should. First of all, because the branch is going to github and not upstream, and most importantly because there is no fixup in my part of the branch. There might be fixups down in history but I'm not repsonsible for those and I cannot do anything about them/.