$ git clone -n https://src.fedoraproject.org/rpms/rpm-ostree.git /var/lib/mock/f31-build-95826-32744/root/chroot_tmpdir/scmroot/rpm-ostree
Cloning into '/var/lib/mock/f31-build-95826-32744/root/chroot_tmpdir/scmroot/rpm-ostree'...
$ git reset --hard 0e64b85f8fcdef03bf5b9bea900e597765479b88
HEAD is now at 0e64b85 sources