how to access remote branch in git 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 branch on different remote

# First fetch all new_remote refs
git fetch new_remote
# Then
git checkout -b <branchname> --track new_remote/<branchname>

Example 3: pull down remote branch git

git fetch origin

git checkout --track origin/<branch_name>