Millions of people across the globe have enjoyed the viral clip of Elma Hajrovic slamming a punch machine with a thunderous shot while wearing a hijab. But few knew her name or her story.

Another user quipped, “If that lady says its Monday it’s Monday.” A third user noted, “She is Elma Hajrovic. A boxer and a karate world champion 2016 etc.” A fourth user chimed ...