$ git clone -n https://src.fedoraproject.org/rpms/tfdocgen.git /var/lib/mock/f41-build-side-1-2670613-29060/root/chroot_tmpdir/scmroot/tfdocgen
Cloning into '/var/lib/mock/f41-build-side-1-2670613-29060/root/chroot_tmpdir/scmroot/tfdocgen'...
$ git fetch origin d8c5d7246a2a579710c192ae12732d7d90de835a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tfdocgen
 * [new ref]         d8c5d7246a2a579710c192ae12732d7d90de835a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8c5d72 convert GPLv2+ license to SPDX