SHELL

git fetch upstream

git remote add upstream https://github.com/ORIGNAL_OWNER/ORIGNAL_REPO.git
git fetch upstream

git fetch upstream

$ git remote -v
# List the current remotes
origin  https://github.com/user/repo.git (fetch)
origin  https://github.com/user/repo.git (push)

$ git remote add upstream https://github.com/otheruser/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)
upstream  https://github.com/otheruser/repo.git (fetch)
upstream  https://github.com/otheruser/repo.git (push)

git fetch upstream from master

$ git rebase upstream/master

$ git checkout master

$ git fetch upstream