git remote -v
git remote add upstream https://github.com/ORIGINAL_AUTHOR/ORIGINAL_REPO.git
git fetch upstream
git checkout master
git merge upstream/master
git commit -m “Sync with upstream”
git push -u origin master
git remote -v
git remote add upstream https://github.com/ORIGINAL_AUTHOR/ORIGINAL_REPO.git
git fetch upstream
git checkout master
git merge upstream/master
git commit -m “Sync with upstream”
git push -u origin master