Channing Tatum has good genes. Web site Ancestry.com dug deep into the “Magic Mike” star’s past yesterday, after he was crowned People’s Sexiest Man Alive, and discovered Tatum hails from a long line of super-hotties. The genealogy service uncovered a picture of John A. Ross — Channing’s great-great-great-grandfather — a Confederate soldier with similar movie-star good looks. The site also revealed this month that George Clooney is related to Abraham Lincoln.