Bug report between git hooks and git worktree

Hello!

I ran into a strange issue using git-worktree with git-hooks. I have attached the output of `git bugreport` below. More concrete steps to reproduce are available in https://github.com/prestontw/git_hook-git_worktree-minimal-repo. I've run into this both in macOS and Fedora---I've included the system information from both of these systems below.

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

Add a git hook that executes git commands inside of another folder. Let's call this other folder `FolderA`. (This might sound weird, but `flutter` distributes itself through a `git` folder in some circumstances and uses `git` commands to see which version the user has installed, etc.).

Add a git worktree branch/folder, `cd` to it, and commit something there. Let's call this git worktree folder `FolderW`.

(Steps are outlined in more detail with an example in https://github.com/prestontw/git_hook-git_worktree-minimal-repo.)

What did you expect to happen? (Expected behavior)

The git command would report details from `FolderA`.

What happened instead? (Actual behavior)

The git command outputs details from `FolderW`.

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

I would expect the git command to output details from `FolderA`. It's confusing to me that there is a difference in behavior between the "main" branch and `FolderW` in git hooks.

Anything else you want to add:

I'm seeing this both in macOS and Fedora. I've added that system info below.

[System Info] git version: git version 2.32.0 (Apple Git-132) cpu: arm64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh uname: Darwin 21.4.0 Darwin Kernel Version 21.4.0: Mon Feb 21 20:35:58 PST 2022; root:xnu-8020.101.4~2/RELEASE_ARM64_T6000 arm64 compiler info: clang: 13.1.6 (clang-1316.0.21.2) libc info: no libc information available $SHELL (typically, interactive shell): /bin/zsh

[Enabled Hooks] pre-commit

[System Info] git version: git version 2.37.3 cpu: aarch64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh uname: Linux 6.0.7-301.fc37.aarch64 #1 SMP PREEMPT_DYNAMIC Fri Nov 4 18:13:35 U> compiler info: gnuc: 12.2 libc info: glibc: 2.36 $SHELL (typically, interactive shell): /bin/bash

[Enabled Hooks] pre-commit