$ git clone -n https://src.fedoraproject.org/rpms/lbzip2.git /var/lib/mock/f45-build-56072-966/root/chroot_tmpdir/scmroot/lbzip2
Cloning into '/var/lib/mock/f45-build-56072-966/root/chroot_tmpdir/scmroot/lbzip2'...
$ git fetch origin 98f29c95ef5d665682f4d6353027e1e1093257d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lbzip2
 * [new ref]         98f29c95ef5d665682f4d6353027e1e1093257d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98f29c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild