TOKYO—By the time she reached the 65th and final lap of her eight-day Olympic odyssey, Sifan Hassan’s neck had seized up and she couldn’t turn her head. She could barely breathe and she couldn’t feel her arms anymore. As she neared the end, she couldn’t see properly and thought “why did they move the finish line?” Her legs knew right where it was. Deep into her sixth race across three distances that covered more than 24 kilometers on Tokyo’s sweltering Olympic track, Hassan burst past world-record holder Letesenbet Gidey to win the 10,000-meter gold on Saturday. “I have never gone deep like I have gone today,” said Hassan, who was born in Ethiopia and left when she was a teenager to settle as a refugee in the Netherlands. No one has. Two of her medals were gold—the 10,000 added to the 5,000 she won to kick off the Games. She …