A group of investors including Knighthead Capital Management LLC, Redwood Capital Management and Abrams Capital Management have formed to press bankrupt utility giant PG&E Corp. for a management overhaul. The hedge funds said in filings late Friday that they’re looking at nominating directors to PG&E’s board and want a say in who the company’s next chief executive officer will be. The funds represent almost 10 percent of PG&E’s outstanding shares, according to the filings.