add remote origin to branch code example

Example 1: add remote origin git

$ git remote add origin https://github.com/user/repo.git
# Set a new remote

$ git remote -v
# Verify new remote
> origin  https://github.com/user/repo.git (fetch)
> origin  https://github.com/user/repo.git (push)

Example 2: add remote branch git

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