Gaskit a git-backed issue tracker. It uses a branch in your local git database to store the tickets.
Gaskit was created as a proof of concept for using Git as a database for an application. It currently only runs against itself.
There is a lot more work to do before it is really useful. If you'd like to help out, clone the repo and run the app to see what needs done.
Running the app
$ bundle install $ bundle exec rackup