Petrified:
{
    "name": "hello-stratum",
    "kind": "stratum",
    "chunks": [
        {
            "name": "hello",
            "repo": "baserock:hello",
            "ref": "f4d032b42c0134e67bdf19a43fa99072493667d7",
            "build-depends": [],
            "unpetrify-ref": "master"
        }
    ]
}

Unpetrified:
{
    "name": "hello-stratum",
    "kind": "stratum",
    "chunks": [
        {
            "name": "hello",
            "repo": "baserock:hello",
            "ref": "master",
            "build-depends": []
        }
    ]
}