My sourcetree was able to push and pull a while ago... now when I try it simply spins...
Not sure how to make it work again...?
Based on another question I was able to fix this:
I opened:
Tools -> Options -> General
There's a section entitled: "SSH Client Configuration"
The "SSH Client" was set to "Putty / Plink"
I switched it to "OpenSSH" and viola, it appears to all work correctly now.
Not sure why it was working and then stopped but I guess that it is good now.
The answer was here:
https://stackoverflow.com/questions/32437659/cannot-pull-git-remote-repository-from-sourcetree/32831317#32831317