Add Jira task number to your commit message

commit-msg

# Add git branch if relevant
parse_git_branch() {
  git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
# Extact tracker abbreviation and ticket number (e.g. DS-123)
parse_git_tracker_and_ticket() {
  parse_git_branch | grep -e '[A-Z]\+-[0-9]\+' -o
}
MESSAGE="$(cat $1)"
TICKET=`parse_git_tracker_and_ticket`
if [ -n "$TICKET" ]
then
   echo "New commit message: [$TICKET] $MESSAGE"
   echo "$TICKET - $MESSAGE" > $1
fi

Put this into .git/hooks/ folder