Steps to sync local repo with a fork

sync-fork.sh

# Configuring a remote for a fork (https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/configuring-a-remote-for-a-fork)

# List the current configured remote repository for your fork.
git remote -v
#> origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
#> origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)

# Specify a new remote upstream repository that will be synced with the fork.
git remote add upstream https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git


git fetch upstream pull/354/head:pr354
git checkout -b 10.0-branch-name pr354

# Verify the new upstream repository you've specified for your fork.
git remote -v
#> origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
#> origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)
#> upstream  https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git (fetch)
#> upstream  https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git (push)

# Syncing a fork

# Fetch the branches and their respective commits from the upstream repository. 
# Commits to master will be stored in a local branch, upstream/master

$ git fetch upstream
#> remote: Counting objects: 75, done.
#> remote: Compressing objects: 100% (53/53), done.
#> remote: Total 62 (delta 27), reused 44 (delta 9)
#> Unpacking objects: 100% (62/62), done.
#> From https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY
#>  * [new branch]      master     -> upstream/master

# Check out your fork's local master branch.
git checkout master

# Merge the changes from upstream/master into your local master branch. 
# This brings your fork's master branch into sync with the upstream repository, without losing your local changes.
git merge upstream/master

# If your local branch didn't have any unique commits, Git will instead perform a "fast-forward":
git merge upstream/master
#> Updating 34e91da..16c56ad
#> Fast-forward
#>  README.md                 |    5 +++--
#>  1 file changed, 3 insertions(+), 2 deletions(-)