sphinx-versioning only build branches / commits with a 'docs/conf.py',
otherwise:
=> Gathering info about the remote git repository...
=> Getting list of all remote branches/tags...
=> Found: docs_theme master resumable_send_recv 0.0.1 0.0.2
=> With docs: 0.0.2
=> Root ref master not found in: 0.0.2
refs #35
