$ git clone -n https://src.fedoraproject.org/rpms/ksystemstats.git /var/lib/mock/f41-build-855569-167171/root/chroot_tmpdir/scmroot/ksystemstats
Cloning into '/var/lib/mock/f41-build-855569-167171/root/chroot_tmpdir/scmroot/ksystemstats'...
$ git fetch origin 981488157fd9335572c6a31411906cb1eadcb334:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ksystemstats
 * [new ref]         981488157fd9335572c6a31411906cb1eadcb334 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9814881 6.1.90