Summary

This article can be used to remove the unwanted files from the commit history.

Solution

Please keep in mind that this step-by-step uses BFG Repo Cleaner as a tool to rewrite the repository's history.

Just a heads up, you will need to install a Java Development kit to run the BFG installer.

1. Clone bare repository on the machine

   $ git clone --mirror <RepoURL>

2.  Check the names of the files by the commit's hash

   $ git show --pretty="" --name-only  <HashID>

3.  Run the BFG to clear your repo's history (Remember to create a backup first, just for reassurance). This command should be executed from outside of the repository

   $ java -jar bfg.jar --delete-files <FileName> <repoName>

4.  Run a GC to clean all the dangling commits left by the BFG

   $ cd repoName
   $ git reflog expire --expire=now --all && git gc --prune=now --aggressive

5.  If you are happy with the results, just push the changes

   $ git push --force

Please make sure to contact our support through https://support.atlassian.com/contact/ to run the Garbage Collection on the server-side repository and get rid of the unwanted commit.