$ git clone -n https://git.cclinux.org/stage/rpms/mrtg.git /var/lib/mock/dist-circle9-build-120938-85718/root/chroot_tmpdir/scmroot/mrtg
Cloning into '/var/lib/mock/dist-circle9-build-120938-85718/root/chroot_tmpdir/scmroot/mrtg'...
$ git fetch origin 9e45f86a08b718e2d3e6a35f499d083e43f68986:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/mrtg
 * [new ref]         9e45f86a08b718e2d3e6a35f499d083e43f68986 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e45f86 import mrtg-2.17.7-11.el9