commit-msg

#!/bin/sh
#
# Get the issue based on a WEB-\d+ regex and prepend it to the commit msg
issue=$(git symbolic-ref HEAD | sed -n 's/^.*\(WEB-[0-9][0-9]*\).*$/\1/p')
if [ -n "$issue" ]; then
        echo -n "$issue " | cat - $1 > /tmp/out && mv /tmp/out $1
fi

Windows version. Need a place where you have write access. Something like:

#!/bin/sh
#
# Get the issue based on a WEB-\d+ regex and prepend it to the commit msg
issue=$(git symbolic-ref HEAD | sed -n 's/^.*\(WEB-[0-9][0-9]*\).*$/\1/p')
if [ -n "$issue" ]; then
        echo -n "$issue " | cat - $1 > /c/users/[user]/documents/out && mv /c/users/[users]/documents/out $1
fi

Merci, @heybrun