A file named 'head' gets confused with the HEAD ref on
case-insensitive file systems. Replace '>head' with '>head.new' to
match the '>head.old' files they are compared to.
Signed-off-by: Brian Gernhardt <brian@gernhardtsoftware.com> Acked-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>