How to get next commit that just after a specified commit

From: wuzhouhui <wuzhouhui14@mails.ucas.ac.cn>
Date: Feb 13, 2019, 09:08 UTC
Message-ID: <383c14cc.9289.168e61d39e8.Coremail.wuzhouhui14@mails.ucas.ac.cn>

Hi,

I have searched Internet for while but couldn't find the answer.

Suppose I have commit
  212146f0800e
then commit
  73a4c5218414
and finally commit
  aadaa8061189

So I get following after 'git log':
  aadaa8061189
  73a4c5218414
  212146f0800e

And now, my question is how to retrieve the next commit (i.e. 73a4c5218414) that just after 212146f0800e?

Please CC me.

Thanks.