if it is passiflora cerulea it is perfectly hardy so dont worry about it getting through the winter. If it is one of the many more tender varieties then you might try giving it some protection by way of bubble wrap perhaps. Passi's root willingly providing they have bottom heat & some humidity. Getting late in the year for cuttings unless you can provide a stable warm environment in a propagator. Good luck.

I was hoping to take a cutting and take it indoors to overwinter. Maybe I should try to dig it up carefully and take it indoors for its first winter.