git post commit hook to trigger if commit message has a key word that starts with %

post-merge.sh

#!/bin/sh

#will priint out a message if a commit contains a keyword prefixed with %
#

MARKERS="%\w+"
RELEASE=$(git log $(git reflog -n 1 | cut -d ":" -f1)  | grep -Pio "$MARKERS"| sort -fu | tr '\n' ' ')

if [ "$RELEASE" != "" ];
then
    echo "**************************************************************"
    echo " NEED to RELEASE  \033[1;31m$RELEASE\033[00m before releasing $(basename $(pwd))"
    echo "**************************************************************"
fi