sentences:  In February 2008, Mehmet extended his contact with St Mirren to 2010.He scored his first ever hat-trick in a Scottish League Cup win against Dumbarton.On 7 March 2009, Mehmet scored the only goal in a 1–0 win at St Mirren Park, converting a penalty to knock Celtic out of the Scottish Cup, and sending the Paisley club into the semi-finals of the tournament.