If the rest of the wood is ok. I would cut them off about half way back and make a new end and then I would make a whole new one the full exposed length and sister it all together. Some wood filler and paint and it will look like you have double rafters.
Thanks for all the suggestions. I'll glue and clamp before nailing with the palm nailer.
The wooden roof and paper are worn out. I'm in the works of trying to schedule a re-roof but would like to minimize additional costs if at all possible. Reroofing is not something I can accomplish.