$ git clone -n https://src.fedoraproject.org/rpms/gogextract.git /var/lib/mock/f38-build-side-42-init-devel-1407945-31363/root/chroot_tmpdir/scmroot/gogextract
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1407945-31363/root/chroot_tmpdir/scmroot/gogextract'...
$ git fetch origin d4e98af1bb78468a5723c614c5bfd553e6cc0379:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gogextract
 * [new ref]         d4e98af1bb78468a5723c614c5bfd553e6cc0379 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4e98af Initial import; Fixes: RHBZ#2234513