I'm working on a new extension for Cocos2d. I tried following the steps at https://github.com/cocos2d/cocos2d-iphone-extensions/wiki/Adding-new-Extension
git submodule update --init
I get error
fatal: reference is not a tree: <some-characters>
I don't have much experience with github. I've a fair idea of how submodules work. I found an answer on the stackoverflow http://stackoverflow.com/a/13425990/286094 which basically ends up with instructions:
Go slap them and tell them to push up their submodule changes
Any idea where things are going wrong? Thanks!