I guess you will have to initialise it manually via js.
So you will have something like this:
<a class="remodal-popup" href="#" data-remodal-target="my-popup">Popup link</a>
<script>
$( document ).ready(function() {
$(".remodal-popup").hover(function(){
//Get data remodal target from this
var target = $(this).attr("data-remodal-target");
//Initialise remodal with target
$(this).remodal().open();
})
});
</script>
However, you should probably also create some logic which checks whether modal is already opened (so it won't open another one, when previous one is still open).