In this post, I will give you a step-by-step on How to synchronize your forked repository with the master repository.
First thing first, go to your forked repository and make sure to you in master branch
git checkout master
Setting Up the Master Remote Repository
git remote add upstream [URL]
Fetch Remote Repository Master
git fetch upstream
Now, you have downloaded the master repository, but not yet merge with your fork repository.
To merge your fork repository with master repository, run the following command:
git merge upstream/master
Now you have merge your local fork repository with master repository.
Next, you just have to push your fork repository to your fork remote repository.
git push fork master
Now you are done synchronize your fork repository with master repository! Congratulations!