Install as cocci_to and create a symlink to cocci_cc, pass --to-cmd=cocci_to --cc-cmd=cocci_cc to get-send-email

cocci_to.sh

#!/bin/bash
#
# cocci_cc - send cover letter to all mailing lists referenced in a patch series
# intended to be used as 'git send-email --cc-cmd=cocci_cc ...'
# done by Wolfram Sang in 2012-14, version 20140204 - WTFPLv2

shopt -s extglob
cd $(git rev-parse --show-toplevel) > /dev/null

patch="$1"
cmd="scripts/get_maintainer.pl --no-rolestats"
to_cmd="$cmd --no-l"
cc_cmd="$cmd -l --no-m --no-r"

function get_addrs() {
        get_cmd="$1"
        #echo "Using cmd: $get_cmd" >&2
        $get_cmd $patch | grep -v "linux-kernel@vger.kernel.org" 2>/dev/null | sort -u
}

to_addrs="$(get_addrs "$to_cmd")"

if [ "$(basename "$0")" = "cocci_cc" ]; then
        cc_addrs="$(get_addrs "$cc_cmd")"
        # Print only emails that are unique to the CC list
        # prevent someone showing up in TO and CC
        #echo -e "CC addrs:\n$cc_addrs\n"
        #echo -e "TO addrs:\n$to_addrs\n\n"
        comm -32 <(echo -e "$cc_addrs") <(echo -e "$to_addrs")
else
        echo -e "$to_addrs"
fi