I still am unable to produce a proper minimal reproduceable example — I've been busy with feature implementation to dig this further, but depending on some context to be determined, in the method_parse_progress_line() ofRemoteProgress sometimes the line argument is abytes string, other times it's anstr string.

I've hit the issue with my implementation inguyzmo/git-repo and to fix it I've made the following fix atline 387 of git.util:

self._cur_line = line = line.decode('utf-8') if isinstance(line, bytes) else line

This issue has been noticed with GitPython 2.1.0, I'm upgrading it locally, to see if it hasn't been fixed with 2.1.1, so please pardon me if it's been fixed ☺