* Giants home runs do the trick * Lincecum comes to Giants rescue (Adds quotes, detail) Oct 10 - The San Francisco Giants blasted three home runs and overcame a shaky start from Barry Zito to beat the Cincinnati Reds 8-3 on Wednesday and set up a one-game showdown for a place in the National League Championship Series. After losing the opening two games of the division series at home, the Giants fought back with two wins on the road to set up a decisive fifth game on Thursday in Cincinnati. ...