$ git clone -n https://src.fedoraproject.org/rpms/rpm-ostree.git /var/lib/mock/f33-build-342541-58760/root/chroot_tmpdir/scmroot/rpm-ostree
Cloning into '/var/lib/mock/f33-build-342541-58760/root/chroot_tmpdir/scmroot/rpm-ostree'...
$ git reset --hard 8420c2f8475f4f9a80a567cabd2f5df0b8457be7
HEAD is now at 8420c2f https://github.com/coreos/rpm-ostree/releases/tag/v2020.8