(Credit: Cory Weaver) The San Francisco Opera will present the Bay Area premiere of “Omar,” by Rhiannon Giddens and Michael Abels. Director Kaneza Schaal will direct the opera and John Kennedy will conduct the opera with a cast that includes tenor Jamez McCorkle, Taylor Raven, Daniel Okulitch, Brittany Renee, Norman Garrett, Laura Krumm, Rehanna Thelwell, Barry Banks, Edward Graves, Calvin Griffin, and Kenneth Overton. “Omar” is inspired by the true {…}