deploy.yml

---
platform: linux

image: docker:///concourse/concourse-ci

inputs:
  - name: release
  - name: final-release

outputs:
  - name: new-release

run:
  # Use sh as can't make a gist file executable in a "nice" way
  path: sh
  args: [release/new-release.sh]

new-release.sh

#!/bin/sh

set -e # fail fast
set -x # print commands

git clone final-release new-release

cd new-release
echo $(date) > release-$(date +%s)

git config --global user.email "nobody@concourse.ci"
git config --global user.name "Concourse"

git add .
git commit -m "New release $(date +%s)"