This classic men's hairstyle is called the Peaked Cut. Ask your hairdresser for a short cut all around with slightly longer pieces at the front. At home, use a little bit of gel in the front and you'll be good to go!
I LOVE REDHEADS! This is a picture of model Johnny Harrington. His hair is very close to Jamie Fraser's, in my opinion. But you don't have to take my word for it! Diana Gabaldon's reaction: "Yeah, that's the hair and skin-tone, all right.