Revert a git commit appending the original commit message\

git-custom-revert

#!/bin/bash
# Copyright (C) 2019 Matthias Sohn
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
read -r -d '' documentation <<-"EOT"
usage: git-custom-revert <commit>
    <commit>    Commit to revert.
Reverts the given commit appending the original commit message to the revert commit message.
EOT
let $# || (echo "$documentation" && exit)

commit=$(git rev-parse $1)
oldmsg=$(git log --format=%B -n 1 "$commit")

git revert --no-commit "$commit" \
    && git commit --no-edit
revertmsg=$(git log --format=%B -n1)
revertmsg+=$'\n'"Original commit message:"
git commit --amend -m "$revertmsg" -m "$oldmsg" > /dev/null 2>&1

Hello Matthias, Nilay from our company had asked about this, and you replied with this. Just looking at it this, and want to check.. is this a custom hook that we can set in the project's hooks dir, or something else?