$ git clone -n https://src.fedoraproject.org/rpms/stress-ng.git /var/lib/mock/f41-build-side-1-2816678-32973/root/chroot_tmpdir/scmroot/stress-ng
Cloning into '/var/lib/mock/f41-build-side-1-2816678-32973/root/chroot_tmpdir/scmroot/stress-ng'...
$ git fetch origin d8433a2aa0c64a5a0248ee524b9f73daa7ba42d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stress-ng
 * [new ref]         d8433a2aa0c64a5a0248ee524b9f73daa7ba42d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8433a2 Update to 0.18.05