composer.json

{
    "repositories": [
        {
            "type": "vcs",
            "url": "git@gitlab.com:ubuntu-it-web/valencia.git"
        }
    ],
    "require": {
        "ubuntu-it-web/valencia": "@dev"
    },
    "extra": {
        "installer-paths": {
            "sites/all/themes/{$name}/": ["type:drupal-theme"]
        }
    }
}