Hose it out while hanging from the head if possible. Then, fill a pot with lukewarm water and dump in about a cup of salt. Stir till mostly dissolved. Use a clean rag such as a wash cloth and wipe the insides down till they shine. Let hang till it dries then if you got feces or gut on the hams where you split them down to the pelvic bone, I'd go ahead and trim about 1/2" of meat off that area. I'm talking about when you split the pelvis, there is a portion of the hind quarters that you end up with "end grain" of the meat exposed. That's the part I trim. Any muscle that has the outer casing intact and has been hosed and wiped down should be fine.
In normal cases, I don't hose them out at all, I just do the salt water wipe down. I don't believe in getting meat wet from plain water if I don't have a reason.