git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git
cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream
git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git
cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream
#tl;dr
pre: assuming you have forked a repo and cloned your fork to your computer
git remote add [maintainer's name] [paste URL here]
git fetch --all
git branch --track [maintainer's name]_[branch] [remote name from step 1]/[branch you want to track]
At this point you may watch to checkout to your newly create branch and issue a git pull
command.