Mark Pope wasn’t lying to the Big Blue Nation when he labeled Koby Brea the most efficient player in college basketball. Through his first two games as a Kentucky Wildcat, Brea has dropped a combined 38 points on 10-12 shooting from beyond the arc. After going for 18 points on a perfect 4-4 clip from deep in the season-opener, the 6-foot-6 guard one-upped himself during Saturday’s win against Bucknell: 20 points on a 6-8 mark from long range. Coming to Lexington by way of a transfer from Dayton as a coin-flip three-point shooter (49.8 percent in 2023-24), he was expected to light it up from th…