Cloning Machines in VirtualBox

SO:

VBoxManage snapshot <YourVirtualMachine> showvminfo <TheSnapshotByName> |sed '/\.vdi/!d;s/^.*{\([^}]*\)}.*$/\1/'

Will give you the UUID of the snapshot file.

Then:

VBoxManage clonehd <TheSnapshotUUID> <YourNewVirtualDisc.vdi>