git checking out a remote branch code example
Example 1: git checkout to remote branch
$ git checkout --track origin/newsletter
Branch newsletter set up to track remote branch newsletter from origin.
Switched to a new branch 'newsletter'
Example 2: git checkout remote branch
git checkout --track origin/<branchname>
Example 3: git checkout branch on different remote
# First fetch all new_remote refs
git fetch new_remote
# Then
git checkout -b <branchname> --track new_remote/<branchname>