$ git clone -n https://src.fedoraproject.org/rpms/libspiro.git /var/lib/mock/f45-build-17022-495/root/chroot_tmpdir/scmroot/libspiro
Cloning into '/var/lib/mock/f45-build-17022-495/root/chroot_tmpdir/scmroot/libspiro'...
$ git fetch origin fca3ea5925b62194ef4c1d526f9344c3e62a8e07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libspiro
 * [new ref]         fca3ea5925b62194ef4c1d526f9344c3e62a8e07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fca3ea5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild