There is a dialog that pops up on running:
git commit --amend
That wants me to review the messages. Is there a way to omit this dialog and
--no-edit is what you are looking for
--no-edit
git commit --amend --no-edit
From this article:
The editor will be populated with the message from the previous commit and including the --no-edit flag will allow you to make the ammendment to your commit without changing its commit message.