This python script is the best I have come up with so far. I just hacked it together and on a cursory first couple uses, seems to be acting correctly, but I can\'t help but
After playing around with Greg's suggestion, I ended up with this:
git log remotes/trunk.. --oneline
which I will either alias or wrap in a small script.
The reason why this works and his suggestion didn't is that my remopte svn branch is remotes/trunk not git-svn. I don't know if this is standard or not, especially since Greg assumed git-svn.