/chanserv mkick (channel)
NOTE: you do not need to use parentheses.
/chanserv mkick #Gryphons
Will provide you with:
-ChanServ- Kicking: SoiL Ximenes
-ChanServ- MassKick complete. Have a nice day
Obviously, if you used this command, the names would be different, depending on who ChanServ kicked, and the name of the channel would be your channel.