BOITUMELO RANTAO  WHEN San Antonio Spurs head coach Gregg Popovich was ejected for protesting a foul call. He looked to assistant coach Becky Hammon to lead the team making her the first female to act as a head coach in  National Basketball Association (NBA) history    The Spurs battled the reigning NBA champions the Los Angeles Lakers in a regular season game, and the moment quickly became historic before the end of the first half.  “Obviously it’s a big deal ... it’s a substantial moment," Hammon said following the game. Asked about the moment she knew she was officially taking over,…