Add variables to New Order staff email notification template

dieselny
New Member
2 0 1

I want to be able to add some sort of code to the body of the "notification email" that is sent to staff when the system sends us an order email. I would like to add various UTM campaign/name/source etc so when I open the email I can see it without having to click "view order" and then find how the person found us.

Thanks.