Weird message when pulling git version 1.6.6.rc1.39.g9a42

$ git pull
remote: Counting objects: 9, done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 5 (delta 4), reused 0 (delta 0)
Unpacking objects: 100% (5/5), done.
From git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
   6035ccd..a252e74  master     -> origin/master
Updating 6035ccd..a252e74
Fast-forward (no commit created; -m option ignored) # what is this ??
 net/sctp/sysctl.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)