Git history was not updated

[ratnamukhesh]

Hi, my leadership has asked to provide the report after removing certain jars in the repo.

I tried the BFG tool on a small repo( one year of commit history). I do see a commit history difference before the push.

But when I run the BFG tool on a large repo( 15 years of commit history). I do not see a commit history difference. ( bfg -D "{xxx.jar, aaa.jar}" /repo/path/test.git)

Details:
Before After
-------------------------------------------
First modified commit | 2d565b5b | 967f2741
Last dirty commit | d12aafbf | e39ff135

Executed : git reflog expire --expire=now --all && git gc --prune=now --aggressive

I can reach 2d565b5b with this commit using git rev-list commitID (or other, git log). But 967f2741 is not able to reach (getting unknown revision or path not in the working tree.) -- before push

Could you please clarify? Am I missing something?

How can I confirm and check commit history has been updated?