Yes, you can fix any damage done to your car or someone else’s but if a person carjacks you, you may not live to fix your car.
Years ago when carjackings were really prevalent I was rear ended, told son to get out, then said no, lock your door.
Turned out to be a ditzy lady with a carload of teens who was not paying attention and then she panicked and drove me into the car in front of me that was stopped for a red light.
This was not a carjacking.