how to add remote branch in git code example

Example 1: git new branch push to remote

git push -u origin <branch>

Example 2: git add remote

git remote add heroku https://git.heroku.com/arrecs.git
git remote -v
-> heroku	https://git.heroku.com/arrecs.git (fetch)
-> heroku	https://git.heroku.com/arrecs.git (push)

git remote remove heroku
git remote -v

Example 3: add remote branch git

git remote add github git://github.com/jdoe/coolapp.git
git fetch github