Initial setup has one branch in the local repository, as shown. The name of the branch is main.
~/repoone$ ls dirone filetwo README.md ~/repoone$ git branch * main ~/repoone$ git status On branch main Your branch is up to date with 'origin/main'. nothing to commit, working tree clean
To create an exact copy of branch main along with its current state, use git checkout as shown.
~/repoone$ git checkout -b maincopy main Switched to a new branch 'maincopy'
Check that the branch is created and checked out.
~/repoone$ git branch main * maincopy ~/repoone$ ls dirone filetwo README.md
Check the status using git status. Note that, unlike branch main, it will not have any link to the remote repository. It is a local repo that you can play with as you like.
~/repoone$ git status On branch maincopy nothing to commit, working tree clean