[Git 常見問題] How to update a forked repo with git rebase

 Source From Here

Step 1: Add the remote (original repo that you forked) and call it “upstream”

# git remote add upstream https://github.com/original-repo/goes-here.git

Step 2: Fetch all branches of remote upstream

# git fetch upstream

Step 3: Rewrite your master with upstream’s master using git rebase.

# git rebase upstream/master

Step 4: Push your updates to master. You may need to force the push with “--force”.

# git push origin master --force