Perl 5 now uses Git for version control 18 years ago
Bazaar and Python are a natural fit. Besides being written in Python, Bazaar provides nice integration with Launchpad -- and Ubuntu makes heavy use of Python in general.
Anyhow, Bazaar has very nice documentation, is easy to use, and certainly has a helpful and friendly community behind it. It's also now officially a GNU project, so it's not going anywhere any time soon.