Remove Sensitive Environment Variable / File That is too Big from Remote Repo

In case mistakenly pushed a large file/sensitive environment data and git rm --cached does not help (pushed to the remote repo but just untracked locally):

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git filter-branch --force --index-filter \   "git rm --cached --ignore-unmatch <path to your file>" \   --prune-empty --tag-name-filter cat -- --all

(cd to the top level of the repo first), add -r flag if you want to remove the whole directory. REF: 

https://docs.github.com/.../removing-sensitive-data-from... 

This error may subsequently follow: fatal: refusing to merge unrelated histories Then

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1	git pull origin the-remote-branch --allow-unrelated-histories

and resolve conflicts.