Forwarding same request to 2 backends in Varnish

Is it possible to forward the same incoming request in varnish to two different backends one after the other ?

I would like to send one particular incoming request to bakend A first and then would like to send the same reqest to bakend b . My varish servers are sitting behind a AWS load balancer and the request which I would like to forwards to 2 varnish servers is a purge request. I don't know which varnish server would be receiving that particular request first, hence I need that request to be forwarded to second varnish server as well , but not until that request has been forwarded to my the first backend, which happens to be my web server.