A piggy bank of commands, fixes, succinct reviews, some mini articles and technical opinions from a (mostly) Perl developer.

Update your git fork from the upstream project

Once:
git remote add upstream https://github.com/otheruser/repo.git

Every time:
git fetch upstream
git checkout master # your fork
git merge upstream/master

# Do not do this if your repo has more than one user:
git reset --hard upstream/master
git push --force origin master

(source)