Move XML element using XDT

Is there a way to move an XML element, including all of its content, inside another element using XDT?

For example, I'd like to transform the following XML:

<?xml version="1.0"?>
<a>
    <b someAttribute="someValue">someContent</b>
</a>

into this:

<?xml version="1.0"?>
<a>
    <c>
        <b someAttribute="someValue">someContent</b>
    </c>
</a>

by moving the b element inside of the newly created c element. I was hoping that something like the following would work:

<?xml version="1.0"?>
<a xmlns:xdt="http://ift.tt/1fUQU29">
    <c xdt:Transform="Insert">
        <b xdt:Locator="XPath(/a/b)" xdt:Transform="an appropriate transform" />
    </c>
</a>

But AFAIK there is no transform that would do this.