Close FETCH_HEAD and release the string url even if we have to leave the
function store_updated_refs() early.
Reported-by: Chris Wilson <cwilson@vigilantsw.com> Helped-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Tay Ray Chuan <rctay89@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>