1. Add the remote called upstream to your own forked repository. git remote add upstream https://the-git-repo-url.com/whoseever/whatever.git 2. Fetch all the branches from that upstream remote repository to remote-tracking. git fetch upstream 3. Make sure that your local repository is checkout as the master branch. git checkout master 4. Rewrite your own forked repository with the upstream/master with rebase or merge, which determine between the effect of the rewriting. If you want your source tree as clean as possible and put the commits that aren't updated with upstream/master yet to the top of it, use git rebase upstream/master If you don't want to rewrite history of your master branch because other people might have cloned it or whatever, use git merge upstream/master If you have rebased your branch onto upstream/master, you may need to force the push in order to push it into your own forked repository. git push -f origin master
