How can I prevent filter-repo from changing the SHA text mentioned in a GIT commit message?

[ChuckM2]

My goal is to:

1. Append the original GIT SHA/hash in each commit message.
2. Make various changes to the tree via filter-repo, without modifying the GIT SHA in each commit message added in step 1.

I achieve #1 via the following command:

git filter-repo --commit-callback 'commit.message = commit.message + b"\n\nOriginal SHA: " + commit.original_id' --force
After this step, I have verified that the commit messages contain the correct SHA strings.

In step 2, I run various commands like:

git filter-repo --path subtree --force

After this step, the "Original SHA" string added to the commit message in step #1 is changed and now wrong.

Is there any way to prevent filter-repo from changing SHA/hash strings in commit messages? I understand that they will be pointing to old SHAs that do not exist in the repo.

Update: I found --preserve-commit-hashes. That worked for me!