Fork fist to your repository. https://github.com/<your-username>/fist
Clone https://github.com/<your-username>/fist
your own repository to develop locally.
git remote add upstream https://github.com/sealyun/test.git
git remote set-url --push upstream no-pushing
Merge fanux/fist to <your-username>/fist
git pull upstream master
git push
Merge <your-username>/fist
to fanux/fist just using github Pull requests.
Pull request
upstream(fanux/fist)<-------------------------origin(<you>/fist)
| ^
| pull upstream master push |
+---------------------->localGit---------+