Checks git message every time and ensure that the message is starting with the defined format. Useful where you need Jira-ID or something similar in start of the message

commit-msg

#!/bin/sh
#
# save this file with this name and mark it executable `chmod +x .git/hooks/commit-msg`

commit_desired_format='(ZA-\d+|GH-\d+|merge)'
error_msg="Aborting commit. Commit message is missing ('ZA-XXX') or ('GH-XXX') or 'merge'"

if ! grep -iqE "$commit_desired_format" "$1"; then
    echo "$error_msg" >&2
    exit 1
fi

#