Best way to discard changes made to Exchange by invoked route

Hello,

I am using Spring XML. I would like to invoke a route synchronously,
passing the current Exchange. However, I want to discard the changes
that the invoked route makes to the Exchange (e.g., modification of
headers).

So far this is the shortest recipe that results in the desired behavior:

<split><constant>1</constant><to uri="direct:Foo"/></split>

Is there a more elegant way to do this?

I tried <recipientList><constant>direct:Foo</constant></recipientList>
but the current Exchange was modified.

Thanks,
~cg