This is Important for any users of cutting edge GemRB - the new repository is at https://github.com/gemrb/gemrb
Run this to update your clone (no need to redo it):
git remote set-url origin git://github.com/gemrb/gemrb.git
or for developers with commit access:
git remote set-url origin email@example.com:gemrb/gemrb.git
GitHub enables easier collaboration and code contributions, so fork away!