Updating homebrew fails
$ brew update
Error such as:
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 is to reset the changes
$ cd /usr/local && sudo git reset --hard FETCH_HEAD