error: Your local changes to the following files would be overwritten by merge:
README.md
Please, commit your changes or stash them before you can merge.
Aborting
Error: Failure while executing: git pull -q origin refs/heads/master:refs/remotes/origin/master
Fix:
cd `brew --prefix`
git remote add origin https://github.com/mxcl/homebrew.git
git fetch origin
git reset --hard origin/master
