Upstream ↔ original Github Repo Forked

References

1. Fork ↔ to copy Github Repo to github.com acc, with link to Upstream to pull Diff

2. Pull Request ↔ to ask Upstream author to review/Merge Fork Diff

3. git remote add upstream _URL ↔ to sync local Repo w Upstream Github Repo

4. -U ↔ flag to origin to Upstream remote