code: def execute(command, params)
        params[:Bugzilla_login]    ||= username
        params[:Bugzilla_password] ||= password
  
        self.last_command = command_string(command, params)
        xmlrpc_client.call(command, params)
      end
docs: Clone of an existing bug
  
   Example:
     # Perform a clone of an existing bug, and return the new bug ID.
     bz.clone(948970)
  
   @param bug_id [String, Fixnum] A single bug id to process.
   @param overrides [Hash] The properties to change from the source bug. Some properties include
     * <tt>:target_release</tt> - The target release for the new cloned bug.
     * <tt>:assigned_to</tt> - The person to assign the new cloned bug to.
   @return [Fixnum] The bug id to the new, cloned, bug.