How can I discard modified files?

Question

This is a Linux 2.6 kernel repository. I git clone it to my local host.

After that. I didn\'t make any change. But when I \"git status\". I found 13 modified files.

Answer 1

It happens because the linux kernel includes files with the same name (but different cases):

include/linux/netfilter/xt_connmark.h 
include/linux/netfilter/xt_CONNMARK.h