$ git clone -n https://src.fedoraproject.org/rpms/caddy.git /var/lib/mock/f41-build-830605-156680/root/chroot_tmpdir/scmroot/caddy
Cloning into '/var/lib/mock/f41-build-830605-156680/root/chroot_tmpdir/scmroot/caddy'...
$ git fetch origin 78fd2309e3315d055c21a51657ad7508132cfda1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/caddy
 * [new ref]         78fd2309e3315d055c21a51657ad7508132cfda1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78fd230 Remove LimitNPROC from systemd unit files