title: Why does git worktree add create a branch, and can I delete it?
body: <p>I used <code>git worktree add</code> to create a new worktree. I noticed that is has created a new branch in the repo with the same name as the worktree. What is this branch for?</p>
  
  <p>I have checked out an other, pre-existing branch in the second worktree. Am I free to delete the branch that <code>git worktree add</code> created?</p>