Although you are cooling the hot rotating parts in a heat soaked engine that is being motored, you are cooling the tgt/mgt/tot probes more than anything else because they have little mass. If you've never done it, motor the engine and then just let it sit and watch the temp climb back up. My point is that if you have the time, if you have the battery juice and if you are not wortied about having some other start issue at a remote or dangerous site then by all means shut down, blow down your temp when you restart. But hot refuel accidents with jet fuel, although they do happen and can be very ugly especially with closed circuit systems, are very rare if done with proper precautions. Keep the fuel truck clear of rotors, have a big extinguisher handy and ground/ bond /earth the piss out of everything and hot fuel away. Gasoline is another story. I'd never hot fuel with it unless it was life or death.