Contributing Code
MassTransit is hosted on GitHub using Git. Git is a powerful, distributed version control system.
With Git, there is no central repository. This is difficult to grasp at first, but majority rules when using a DVCS.
The continuous integration (CI) build running on TeamCity pulls from:
http://github.com/phatboyg/MassTransit
You can fork your own copy if you want to make modifications using a Git workflow as described.