Git commands to sync repo

git remote add oldrepo https://github.com/path/to/oldrepo

2. To Get the old repo commits

git remote update

3. To examine the whole tree

git log --all --oneline --graph --decorate

4. To copy (cherry-pick) the commits from the old repo into your new local one

5. check your local repo is correct

6. send your new tree (repo state) to github

7. remove the now-unneeded reference to oldrepo

Video reference:

DevOps