Let /git be a git repo, suppose path /git/foo/bar exists (file or directory).

>>> git.Repo('/git/foo/bar')
<git.Repo "/git/.git">

I think this is very dangerous behaviour. For example, in a testing environment one might use

shutil.rmtree(some_repo.working_dir)

where, if some_repo was subject to the behaviour above, created from a path in a project's working directory, unhappiness might ensue.