Be sure your commit is Signed off by

In order for your contributed code to be included, it needs to be "Signed-off". More info about it are available in file CONTRIBUTING.md

Signing off is a manual operation and therefore easy to forget. You can tell git to help you checking if it's missing: it will prevent you from adding a commit that is not signed off.

Create file REPO/.git/hooks/commit-msg and give it executable permissions. Paste the following code into it:

#!/bin/sh
test "" = "$(grep '^Signed-off-by: ' "$1" | sort | uniq -c | sed -e '/^[ 	]*1[ 	]/d')" || {
	echo >&2 Duplicate Signed-off-by lines.
	exit 1
}

test "" != "$(grep '^Signed-off-by: ' "$1")" || {
	echo >&2 Missing Signed-off-by line. Missing --signoff?
	exit 1
}