mxcl/homebrew — pull request #12814 by patricklucas (2012-06-13 17:14:14+00:00)
Title: Suggest git clean -f for untracked changes

For whatever reason, a bad update or something, some untracked formulae were left in my `/usr/local/Library/Formula`. `brew doctor` complained, but its suggestion to run `git reset --hard` was insufficient to remove untracked files. `git clean -f` accomplishes this.