Define extension point implementation order

I am implementing a plugin which depends on 'git4idea'. In the old days, my functionality did work. and My code was called. I am writing a custom commit message provider. But now, because (last year) 'git4idea' implemented one provider with order 'first', my provider is newer called. And I can't find any way to make it be called? Does there exist action after message loaded? I need to be notified to do some message enrichment after load. Or load it myself and enrich it.

Place: plugin.xml(Git4Idea)
614: <vcs.commitMessageProvider implementation="git4idea.commit.GitCommitTemplateMessageProvider" order="first"/> 

And I can't get to be called before this, or notified after this.

Calling logic: com.intellij.vcs.commit.AbstractCommitMessagePolicy:getCommitMessageFor
CommitMessageProvider.EXTENSION_POINT_NAME.extensionList.forEach { provider ->
  val providerMessage = provider.getCommitMessage(changeList, project)
  if (providerMessage != null) return providerMessage
}