Host nation France will meet twice champions Fiji in the final of the Olympic men’s rugby sevens tournament later on Saturday. The French crushed South Africa 19-5 in the first semi-final at the Stade de France and then watched Fiji humiliate Australia. Ryana Rebbadj scored two tries and converted them for France after the first half had ended 0-0. Fiji, who won at Rio 2016 for the country’s first ever Games medal and in Tokyo, blew Australian away 31-7 as Waisea Nacuqu and Iowane Teba shone. South Africa will face Australia for bronze before the final, when Fiji will go for a third gold in ju…