how to update master branch of forked repo code example
Example 1: update fork repository
## Add Original Repository
git remote add upstream https://github.com/OriginalOwner/OriginalProject.git
## Verify if Repository is added
git remote -v
## Fetch Updates from Original Repository
git fetch upstream
## Checkout to your master branch
git checkout master
## Get Updates from upstream repo
git merge upstream/master
## Push the commit over
git push origin master
Example 2: git update fork from original repo
$ git remote add upstream https://github.com/[Original Owner Username]/[Original Repository].git
$ git fetch upstream
$ git checkout master
$ git merge upstream/master
$ git push