$ git clone -n https://src.fedoraproject.org/rpms/python-niaarm.git /var/lib/mock/f40-build-2366118-60377/root/chroot_tmpdir/scmroot/python-niaarm
Cloning into '/var/lib/mock/f40-build-2366118-60377/root/chroot_tmpdir/scmroot/python-niaarm'...
$ git fetch origin 26c8047fd891a8101eba51286703f56cdb218a49:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaarm
 * [new ref]         26c8047fd891a8101eba51286703f56cdb218a49 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26c8047 Update to 0.3.6