Clone VM with a different serial number?

[maximvelichko]

I would like to clone an existing VM with a different serial number. Is there any trick to achieve it?
It looks like Apple's virtualization API does not support it.
Yet, if I --restore a VM from an .ipsw, I get a new random (?) serial number every time. (Random, or not, that's exactly what I need!)

However, I don't want to go through the same setup and provisioning steps again every time. Is there any trick to clone a VM and force a serial number to get regenerated (randomly, or explicitly, either it will work for me)