$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Serializer.git /var/lib/mock/f40-build-2239066-53593/root/chroot_tmpdir/scmroot/perl-Data-Serializer
Cloning into '/var/lib/mock/f40-build-2239066-53593/root/chroot_tmpdir/scmroot/perl-Data-Serializer'...
$ git fetch origin 3b5678fae1249d1141261dd7009d78753be30406:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Serializer
 * [new ref]         3b5678fae1249d1141261dd7009d78753be30406 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b5678f Update license to SPDX format