Using certmonger, how to generate a new key with a different key length?

Issue

• Cermonger getcert does not seem to honor -g parameter?

• When I type:

  selfsign-getcert request  -f /etc/pki/testcert.pem -k /etc/pki/testkey.key -g 4096
  openssl x509 -in /etc/pki/testcert.pem -text -noout > /tmp/1
  getcert stop-tracking -i `getcert list  | grep ID | cut -c 13-26`; rm -f /etc/pki/testcert.pem
  selfsign-getcert request  -f /etc/pki/testcert.pem -k /etc/pki/testkey.key -g 1024
  openssl x509 -in /etc/pki/testcert.pem -text -noout > /tmp/2
  sdiff /tmp/1 /tmp/2
  

• Then I cannot see any differences in any key lentgh??