rebuild for f31/rawhide, including:
    use the %{cmake} %global to get all the extra Fedora cmake options.
      (This is Fedora, so don't care so much about rhel/rhel7 cmake3.)
    reset epoch to 1. Note we use (have been using) epoch=1 in Fedora since
      forever. I presume this is so that people can install Ceph RPMs from
      ceph.com if they prefer those, which use epoch=2, and not run into issues
      when updating.
    
    Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>