Wiki git instructions don't work

Git-clued, please reply directly to me and I’ll update the wiki.
No need to spam the whole list. Says:

[jblaine@dev:~/src] git clone Initialized empty Git repository in /home/jblaine/src/chef/.git/ ... [jblaine@dev:~/src] cd chef
[jblaine@dev:~/src/chef] git remote add opscode
[jblaine@dev:~/src/chef] git config branch.master.remote opscode
[jblaine@dev:~/src/chef] git checkout --track -b CHEF-4418 opscode/master
fatal: git checkout: updating paths is incompatible with switching branches.
Did you intend to checkout ‘opscode/master’ which can not be resolved as