$ git clone -n https://src.fedoraproject.org/rpms/ksystemstats.git /var/lib/mock/f40-build-796045-140456/root/chroot_tmpdir/scmroot/ksystemstats
Cloning into '/var/lib/mock/f40-build-796045-140456/root/chroot_tmpdir/scmroot/ksystemstats'...
$ git fetch origin 6ad5e3c5f3dd72c3670bcf3ad07bb1501bdfa7ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ksystemstats
 * [new ref]         6ad5e3c5f3dd72c3670bcf3ad07bb1501bdfa7ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ad5e3c 6.0.2