$ git clone -n https://src.fedoraproject.org/rpms/lout.git /var/lib/mock/f45-build-17577-501/root/chroot_tmpdir/scmroot/lout
Cloning into '/var/lib/mock/f45-build-17577-501/root/chroot_tmpdir/scmroot/lout'...
$ git fetch origin d2b481c71863613ba8c5a9abe4e054f8663345b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lout
 * [new ref]         d2b481c71863613ba8c5a9abe4e054f8663345b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2b481c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild