LOS ANGELES — An up-and-coming rapper known as Pop Smoke was fatally shot during a break-in early Wednesday at a Hollywood Hills home, his label said. “We are devastated by the unexpected and tragic loss of Pop Smoke,” Republic Records said in a statement. “Our prayers and thoughts go out to his family, friends and fans, as we mourn this loss together.” Los Angeles police did not immediately confirm the identification. Police officers found the victim shortly before 5 a.m.