Create a btrfs snapshot of the default container:

# btrfs subvolume snapshot /var/lib/machines/default /var/lib/machines/clone

Change the mac address: Random Mac Address

# nano /var/lib/machines/clone/etc/systemd/network/mv-mvl0.network
-------------------------------------------
[Match]
Name=mv-mvl0

[Link]
MACAddress=00:16:3e:8c:7d:f8

[Network]
DHCP=yes
LinkLocalAddressing=no

Start and Enable the container:

$ sudo machinectl start clone
$ sudo machinectl enable clone