Test Architecture Tweak

As I was starting to write tests for sync-fork, wanted to try and simplify the test architecture a little bit.
Tests now update the remote with a second repository instead of using local and resetting.
This was just easier for me to think about and more closely mirrors reality.

@kevgo what do you think?

Note: I used git-extract to pull this off my sync-fork branch.
You can't be on a remote feature branch. The remote branch lives on Github. You can have a feature branch with a remote commit, i.e. one that lives only on Github but not on your (local) machine. For example if you added that one on another machine.