'git worktree add' does not fire post-checkout hook

[Gumbel, Matthew K]

Hello all,

I've noticed that when I run 'git worktree add /path/to/new/tree', the 
post-checkout hook does not fire, even though the worktree manpage explicitly 
states that "worktree add" will, "Create <path> and checkout <branch> into it."

Is this the intended behavior? Seems like maybe a bug, but I'm not sure.

Thanks
Matt