includeIf not matching during `git rebase`

* What did you do before the bug happened? (Steps to reproduce your issue)

With ~/.gitconfig having:

[includeIf "onbranch:pr/"]
        path = .gitconfig.for-upstream

where the included config changes commit-msg hook,

git checkout pr/zzz # has multiple commits over upstream git rebase -i

(modify it) git rebase --continue

* What did you expect to happen? (Expected behavior)

The commit messages are unchanged.

* What happened instead? (Actual behavior)

The rebased commits had messages modified by default commit-msg hook.

* What's different between what you expected and what actually happened?

I'd expect includeIf to match and in effect prevent the default commit message modifications.

[System Info] git version: git version 2.41.0.487.g6d72f3e995-goog cpu: x86_64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh compiler info: gnuc: 12.2 libc info: glibc: 2.36 $SHELL (typically, interactive shell): /bin/bash

[Enabled Hooks] commit-msg pre-commit prepare-commit-msg