git switch --create / -c

git switch -c main

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

See also

• git switch
• git branch, git: upstream, git branch --delete branch name, [ --list | -a | -r | -M ]