One of the few cleanup projects the San Francisco 49ers had on their list after the 2012 season got off to a good start in Week 1 of 2013.The 49ers covered kickoffs much better against the Green Bay Packers than they did last year, when they ranked 31st in the NFL. San Francisco allowed an ugly 26.9 yards per kickoff, and of course gave up a kickoff return for a score in the Super Bowl loss to Baltimore.Sunday, the 49ers allowed Green Bay just 13.