Cut back the growth by 1/3 and ideally put them in a greenhouse with a minimum temperature of 45-50deg f
if you don,t have a greenhouse, put them somewhere with plenty of light and the same temperature, keep them just moist until growth resumes, then more water, you can take cuttings of overwintered plants in spring,
you could have taken cuttings in july, too late now , but
you know for next year. derekm