Oh I think I get what you're saying. What you can do is create a new Listener on a unique port, and then assign your vhost to that listener. It's what I do for domainless things like PHPMyAdmin. So then I can reach it with https://SERVERIP : PORT (spaces added to avoid smiley)
EDIT or this might not be what you mean haha, but it would be a way to temporarily access your site if you need it.