You can find the source of this version on GitHub at concourse/concourse. It was created based on the commit
You can reference this release in your deployment manifest from the
- name: "concourse" version: "4.2.1" url: "https://bosh.io/d/github.com/concourse/concourse?v=4.2.1" sha1: "470a6fdd7cb82fc723d7d78930c7d261ca4a6cb4"
Or upload it to your director with the
bosh upload-release --sha1 470a6fdd7cb82fc723d7d78930c7d261ca4a6cb4 \ https://bosh.io/d/github.com/concourse/concourse?v=4.2.1