ENQUEUE_UNIQUE_RENDER_COMMAND and getting the FSceneView

I would like to have a render command that can access the ViewRect and the ViewMatrices of the FSceneView (Views[0] in the Render function), how would I go about accessing that information in an ENQUEUE_UNIQUE_RENDER_COMMAND, or ENQUEUE_UNIQUE_RENDER_COMMAND_ONEPARAMETER, etc?

I need to do some special rendering but I need the viewport dimensions and the view and projection matrices in order to do it.

Thanks!