gistfile1.txt

~% rm -rf /usr/local/.git
~% cd /usr/local
/usr/local% git init
Initialized empty Git repository in /usr/local/.git/
/usr/local[master]% git remote add origin git://github.com/mxcl/homebrew.git
/usr/local[master]% git checkout -b master2 origin/master
fatal: git checkout: updating paths is incompatible with switching branches.
Did you intend to checkout 'origin/master' which can not be resolved as commit?
/usr/local[master]% git branch -D master
error: Cannot delete the branch 'master' which you are currently on.
/usr/local[master]% git branch -M master2 master
error: refname refs/heads/master2 not found
fatal: Branch rename failed
/usr/local[master]% brew update

error: pathspec 'master' did not match any file(s) known to git.
Error: Failure while executing: git checkout -q master