I automate part of my macOS builds for new OS releases. I use a simple script (_version_check.sh) that I update with the latest release, ie … 12.2.1. Then I commit it to my repo and fire a webhook to Jenkins. Jenkins takes the version number and checks to see if it’s available via the "softwareupdate" command.

softwareupdate --fetch-full-installer --full-installer-version "$version_to_download"

If it is, it downloads the full installer app, “Install macOS Monterey.app“, to the Applications folder. When that is successful, I have a second Jenkins job that converts the “.app" to a “.dmg" . I archive the “.dmg" and use it in automated workflows with tools like MDS

Scripts are on Github