$ git clone -n https://src.fedoraproject.org/rpms/knights.git /var/lib/mock/f42-build-880810-183010/root/chroot_tmpdir/scmroot/knights
Cloning into '/var/lib/mock/f42-build-880810-183010/root/chroot_tmpdir/scmroot/knights'...
$ git fetch origin 72b55c20457abe6692af0848b74338c2f02a79f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knights
 * [new ref]         72b55c20457abe6692af0848b74338c2f02a79f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72b55c2 Rebuild for ppc64le enablement