List the remote branches that exist for a repository you have cloned:
git remote show origin
Create a local branch that tracks one of the remote branches and then use that local branch:
git checkout --track -b name_of_local_branch origin/name_of_remote_branch
If you have not done a pull since someone else created the remote branch, you may first need to do:
git fetch
Remove branch from repo.
git push {repo} :heads/{branch}
Ex: git push origin :somebranch
removes somebranch