The buzz around Jamaica Plain Porchfest is getting out of hand. Co-organizer Marie Ghitman can't get a tow without the repairperson enthusiastically promising to bring his family from Mattapan. Ghitman and Mindy Fried, who came up with the idea of matching local bands with local porches for an afternoon of music and community-building, took a break Thursday morning from organizing the event to talk about the amazing response they've had from local residents and musicians. Ghitman got the ball rolling about a year ago when she heard about Somerville's Porchfest. "We thought, 'We have great porches and great musicians,' so we should have a Porchfest," Ghitman said.