Here's the theory on autoflower cloning, I'm talking out my ass on this one with no actual experience with these strains.
Clone an auto theory 1
Ruderalis hybrids are flowered via age, not on photoperiod. so a cutting will be the same "age"
So.. to suspend the "aging" take a tissue culture, and grow the plantlets.
Clone and auto theory 2
The idea is to self the clone by forcing a hermie, get the auto to self polinate, so you would get an S1 copy or a selfed seed, next to taking a cutting this would be the closest way to get copy.