Get List Items from list linked by lookup

I'm making a JavaScript extension for form elements. The goal is to bind it to a lookup and react on change. Since I'm weak at webservices, I'm using SPServices.

var lookupFieldInternalName = "LookupOne";

$().SPServices({
    operation: "GetList",
    listName: "Spis",
    completefunc: function(xData, Status) {
        console.log(xData.responseText);
        $(xData.responseXML).find("Fields > Field[Name='" + lookupFieldInternalName + "']").each(function() { ... });
    }
});

Inside I want to make a query to the list with lookup values. But in the field I get the only thing I have is the lookup's list Guid.

How can I get the lookup list name to query it? Or, how to query a list when all I got is a Guid?

Please provide code examples.