Switch Git to Fork.md

git remote rename origin upstream
git remote add origin https://github.com/user/FORK.git
git checkout -b newFeatureBranch

Whenever you need to update your fork based on the recent evolution of the original repo:

git checkout master
git pull # it pulls from upstream!
git checkout newFeatureBranch
git rebase master # safe if you are alone working on that branch
git push --force # ditto. It pushes to origin, which is your fork.