The SproutCore account has moved from the sproutit account to the sproutcore account on github.
This repository is now available at http://github.com/sproutcore/sproutcore.
While we will leave this repository around for a bit longer, it will no longer be the canonical SproutCore repository and we will eventually remove it!
git remote rm origin
git remote add origin git://github.com/sproutcore/sproutcore.git
Open the .gitmodules file in your repo's base directory.
Replace all occurrences of github.com/sproutit with github.com/sproutcore.