commit-msg goes into .git/hooks/commit-msg (chmod 755)

commit-msg-goclone

#!/bin/sh

ref=$(git symbolic-ref HEAD 2> /dev/null) || return
ref=${ref#refs/heads/}
# allow for branch names:
#   tick12+12_fubar
#   tick12+12-fubar_sd
#   ticket12+12-fubar_sd
#   ticket12+12+123-fubar_sd
# or tick(et) replaced by issue (redmine conform)
#   issue12+12
# etc.
tick_num=$(echo "$ref" | gawk '// { match($0,"(issue|tick(et)?)[_]?([0-9+]+)",a); gsub( "+", " ", a[3]); printf a[3]; }')

if [ "$(cat $1 | grep -v ^#)" == "" ] ; then
  # commit message completely empty, commit should be aborted.
  exit 0
fi

if [ "$tick_num" != "" ] ; then
  echo "" >> $1
  for n in $tick_num ; do
    echo "refs #"${n} >> $1
  done
fi
echo "" >> $1
echo "On branch: ${ref}" >> $1
echo "" >> $1