sync a fork with upstream master code example

Example 1: steps to sync branch to fork master?

$ git remote -v
> origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
> origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)

Example 2: steps to sync branch to fork master?

$ git checkout master
> Switched to branch 'master'