I want to create a worktree for an existing directory - but I don't want to add a branch in it. As far as I understand, in git CLI I can do this with git worktree add --detach PATH. Is there a way to do that in libgit2, or am I misunderstanding how that CLI feature works?

I understand to create a worktree in libgit2 I need to use git_worktree_add(). However, by default it seems to create a new branch based on the passed name argument. Is it possible to call it in some way that would not create a new branch, and just use HEAD or any passed reference in a detached mode?