My 2 cents:

I don't like much the idea of naming a branch by a number. I use git-flow (https://github.com/nvie/gitflow) and there is a standard name convention.

It would be nice to adapt the pit hook to branch name of the form : pit<num> or in regexp /.pit\d+$/

On the other hand I use wedoist.com They don't have any API for now (http://wedoist.com/Help/showQuestion/137) It would definitively be great to have the ability to synchronize task with this service.