My website is built and managed on Replit, not GitHub; but it does have a GitHub Repo. Currently using Git I you can import from GitHub but not vise versa. This would be a very useful feature that would help people using GitHub and Replit.
You can. Just go to the Git pane and import from existing repo, and then commit and push.
Well as long as the FIT has the latest version. It might be just safer to create a new repl and import the latest GIT and get rid of the one out of sync.