Setting remote and upstream for a clone/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
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)