Enable hide-refs in production to reduce git-refs pressure
We could have savings both in FS pressure and network bandwidth
Coming from https://gitlab.com/gitlab-org/gitlab-ce/issues/24329
We should add the following to our git configuration:
omnibus_gitconfig['system'] = {
"transfer" => ["hideRefs=^refs/tmp/", "hideRefs=^refs/keep-around/"],
}
cc/ @ayufan