Revoke a DHCP lease early?

[Modulok]

List,

I'm running isc-dhcpd to serve leases to clients. Is there a way to expire a
lease before it normally would, i.e. force a client to re-negotiate a lease
early? Perhaps some shell command akin to the following (which would be nice,
but obviously doesn't work)::

    dhcpd --revoke 192.168.1.24

How do you revoke a client's lease prematurely?

Thanks.
-Modulok-