packages.json

{
    "packages": {
        "my-group/my-project": {
            "dev-master": {
                "name": "my-group/my-project",
                "source": {
                    "reference": "882816c7c05b5b5704e84bdb0f7ad69230df3c0c",
                    "type": "git",
                    "url": "git@gitlab.example.com:my-group/my-project.git"
                },
                "type": "project",
                "version": "dev-master"
            },
            "v1.5": {
                "name": "my-group/my-project",
                "source": {
                    "reference": "882816c7c05b5b5704e84bdb0f7ad69230df3c0c",
                    "type": "git",
                    "url": "git@gitlab.example.com:my-group/my-project.git"
                },
                "type": "project",
                "version": "v1.5"
            }
        }
    }
}