$ git clone -n https://src.fedoraproject.org/rpms/ksystemstats.git /var/lib/mock/f40-build-2500482-61672/root/chroot_tmpdir/scmroot/ksystemstats
Cloning into '/var/lib/mock/f40-build-2500482-61672/root/chroot_tmpdir/scmroot/ksystemstats'...
$ git fetch origin 0cef3d1a6124f7c6c0f81c9fc869cb972cbe7135:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ksystemstats
 * [new ref]         0cef3d1a6124f7c6c0f81c9fc869cb972cbe7135 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cef3d1 6.0.0