What about using git notes (`man git-notes`) for tracking issues, comments, etc? They are stored as git objects (right?) and could be used for this task?
I thought about using git notes for this and didn't how it is better than adding issues, comments and wiki inside the repo itself. We are used to put documentation and tests alongside the code in our repo, why not add wiki and issues?
You can make an excellent case for that: this would require documentation and tests to be up-to-date before a commit would be accepted by whoever maintains the repo.
