なんかやばいらしいのでgitのバージョン上げる

$ brew update
error: Your local changes to the following files would be overwritten by merge:
    Library/Formula/go.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

$ cd /usr/local/Library/Formula
$ git reset --hard FETCH_HEAD
$ brew update

$ brew upgrade git
==> Upgrading 1 outdated package, with result:
git 2.2.1
==> Upgrading git
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/git-2.2.1.mavericks.bottle.tar.gz
######################################################################## 100.0%
==> Pouring git-2.2.1.mavericks.bottle.tar.gz
==> Caveats
The OS X keychain credential helper has been installed to:
  /usr/local/bin/git-credential-osxkeychain

The "contrib" directory has been installed to:
  /usr/local/share/git-core/contrib

Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

zsh completion has been installed to:
  /usr/local/share/zsh/site-functions
==> Summary
  /usr/local/Cellar/git/2.2.1: 1356 files, 31M

$ git --version
git version 1.9.3 (Apple Git-50)

$ cat /etc/paths
/usr/local/bin
/usr/bin
/bin
/usr/sbin
/sbin

$ git --version
git version 2.2.1