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.
I'm not trying to limit it to that. However that step definition is ambiguous and will need to either create a local feature branch or a feature branch with a tracking branch. Previously it was local. Do you want to keep it that way?