$ git clone -n https://src.fedoraproject.org/rpms/nbd.git /var/lib/mock/f31-build-57223-28309/root/chroot_tmpdir/scmroot/nbd
Cloning into '/var/lib/mock/f31-build-57223-28309/root/chroot_tmpdir/scmroot/nbd'...
$ git reset --hard 63b5447712b649e7c83c4c82b8d71b488c28f21f
HEAD is now at 63b5447 New upstream version 3.19 (RHBZ#1671079).