Amending commit message would not update PR description about ghstack

[ezyang]

This is by design, since it is very common for people to edit PR descriptions after the fact. Use ghstack --update-fields to clobber the PR description.

[Zacharias030]

Is there a way to use --update-fields only on a specific commit of my stack?
Often the first commit is where I introduce the whole stack in the PR description and then I want to "push" the changed commit message of some commit downstream of that.

[ezyang]

No, but this is a feature that is worth supporting, along with generally letting people update only a single commit on their stack. Feel free to open an issue about it.

[xuhdev]

I always run git rebase -i HEAD~N to edit a single commit. See https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History