The below is an example, I want to ignore *head1* and *its content* when
export to html, but for some reason I can't add tags to head, How to
solve this problem?

If I want to rename *head2* to *new-head2*, how to do?

#+BEGIN_ORG
* head1
  content1
  
* head2
  content2
  
* head3
  content3
#+END_ORG

Thanks!