fix broken homebrew

gistfile1.sh

# PROBLEM ****************************************************************************
error: Your local changes to the following files would be overwritten by merge:
	Library/Formula/node.rb
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 BELOW -------------------------
cd $(brew --repository)
sudo chown -R $USER .
git reset --hard origin/master
brew update