Megha Ganne saved her best round ever in a tournament for an event that she calls “the most exciting week in amateur golf.” But can she win it all? The New Jersey golfer, who grew up in Jersey City before moving to Holmdel for high school, shot a record nine-under 63 to take a two-shot lead over defending champion Lottie Woad in the Augusta National Women’s Amateur on Wednesday in Augusta, Ga.