I tried to use the Add Working Copy pane of the Clone / Add / Create Repository function to create a second working copy, but get the message "This is not a valid working copy path". There is nothing special about the working copy path: it is just an empty folder.
Am I doing this right? What I want is a second copy (different branch) of the same code, working on the same repo. I think the git worktree command is what I want, but I'd like to manage it from within Souircetree if that's possible. Any help on this would be greatly appreciated.