gives me 404, I guess there are many unsynced mirrors
-bash-4.3# ostree remote add fedora-24 --set=gpg-verify=false
https://dl.fedoraproject.org/pub/fedora/linux/atomic/24-bash-4.3# rpm-ostree rebase fedora-24:fedora-atomic/f24/x86_64/docker-host
error: Server returned status 404: Not Found