Something not pretty, but that works well for me, is using yarn to manage dependencies on upstream Helm chart repositories, then use kustomize to override certa

Something not pretty, but that works well for me, is using yarn to manage dependencies on upstream Helm chart repositories, then use kustomize to override certain things if required. That checkouts a local copy locked at a specific version, which you can bump easily, and allows overriding the template definitions on your side. No need for additional infrastructure.