$ git clone -n https://src.fedoraproject.org/rpms/libxo.git /var/lib/mock/f45-build-17348-498/root/chroot_tmpdir/scmroot/libxo
Cloning into '/var/lib/mock/f45-build-17348-498/root/chroot_tmpdir/scmroot/libxo'...
$ git fetch origin 0b718a5c7d32f373164afc0f45ea144f90851236:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxo
 * [new ref]         0b718a5c7d32f373164afc0f45ea144f90851236 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b718a5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild