Keeping your local branch in sync with the upstream is a good practice. In the case of quickstarts we use the develop branch to run ci tests and aggregate changes for release. So it a good idea to keep track of the commit to upstream/develop so you work in progress is easily intregrated.
Fetch branches from remote.
git fetch --all
Fetching origin
Fetching upstream
.... (updates) ....
Reset the HEAD of you fork so that it is even with your upstream branch.
git reset --hard upstream/develop
HEAD is now at a29330a Commit message of the last commit in upstream/develop
Force push your local changes to your origin. This will make upstream/develop and origin/develop even.
git push --force-with-lease origin develop
Everything up-to-date
or
Shows pushed changes
Be carefull all the changes in your forks develop branch will be lost. If you have any work in this branch stash it elsewhere!