Let's take a scenario:
This is the remote repository: https://github.com/apache/mystudio.git
Your forked repository from the above: https://github.com/kolipakakondal/mystudio.git
'development' is the branch name both in remote and forked repository.
1. Add remote repository to forked repository
>git remote add upstream https://github.com/apache/mystudio.git
2. Fetch from remote repository .i.e upstream
> git fetch upstream
3. Rest your branch(ex: development) to the remote branch(ex: development)
> git reset --hard upstream/development
4. Pushed changes which we got it form remote repo to remote forked repo.
> git push origin development --force