I just updated SourceTree, and what did I find? They updated their logo! But the funny thing about it is their striking similarity to the icon I designed in March, 6 months before they released theirs.
The similarity is striking. But alas, I don't care. It's just cool to see I was on the right path. :)
(Also, as of writing this post, if you did a google search for "sourcetree app icon", my icon is the first or second result)