Bug: being stuck in rebase mode when accidently typing `git am`

Thank you for filling out a Git bug report! Please answer the following questions to help us understand your issue.

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

1. Run `git init` in an empty directory, and commit once.
2. Run `git am` and press Ctrl-C.
3. Run `git status`. It will say: 'You are currently rebasing. (all 
conflicts fixed: run "git rebase --continue")'.
4. Run `git rebase --continue`

What did you expect to happen? (Expected behavior) I expected to go out of the rebase mode such that `git status` would say: "nothing to commit, working tree clean"

What happened instead? (Actual behavior) It outputs: "warning: could not read '.git/rebase-apply/head-name': File does not exist." Moreover, you are in rebase mode forever, and you cannot escape from it!

What's different between what you expected and what actually happened? Instead of going out of rebase mode (expected), you are still in rebase mode and you cannot escape it (actual).

Anything else you want to add: `rmdir .git/rebase-apply` fixes the issue

Please review the rest of the bug report below. You can delete any lines you don't wish to share.

[System Info]
git version:
git version 2.49.0
cpu: x86_64
built from commit: 683c54c999c301c2cd6f715c411407c413b1d84e
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh
libcurl: 8.12.1
OpenSSL: OpenSSL 3.4.1 11 Feb 2025
zlib: 1.3.1
uname: Linux 6.12.22-1-lts #1 SMP PREEMPT_DYNAMIC Tue, 08 Apr 2025 
06:20:12 +0000 x86_64
compiler info: gnuc: 14.2
libc info: glibc: 2.41
$SHELL (typically, interactive shell): /bin/bash

[Enabled Hooks]