How to get the dom of cloned one

[IFEIFEI]

When I use drag like this

$(".box").draggable({
        connectToSortable: ".column",
        helper: "clone",
        handle: ".drag",
        start: function(e,t) {
        },
        drag: function(e, t) {
        },
        stop: function(event,ui) {
        }
});

here I want to go the dom element.When I use $(this),I will get the original dom element,but I want to get the cloned dom element,how could I access it.