sample.entwine.js

(function ($) {
    
    var clonePriorTimes = function (button) {
        var toCopy = button.attr('name');
        console.log(toCopy);
    };
    
    $('.cms-edit-form .field.can-copy .ui-button').entwine({
        onclick: function () {
            clonePriorTimes(this);

            this._super();
        }
    });

})(jQuery);