I had a file F that exceeded 100 MB limit that I tried to push. So the push failed. I then removed the file, because it could not be pushed and assumed I needed to do add . ; commit and push again. In the auto generated commit it said deleted file F. Upon push it still tried to upload that file. Well ok, so I figured I need to unstage F. SO I did reset F. I got the message fatal: ambiguous argument 'out': unknown revision or path not in the working tree. No idea what that meant, so I tried to make git show me the staged files diff --cached, but the output is empty. I am confused about the situation and how I can untangle it.
To recap the chain :
$> git add. ; git commit
$> git push
$> remote: error: File F is 143.41 MB; this exceeds GitHub's file size limit of 100.00 MB
$> rm F
$> git add. ; git commit
$> git push
$> remote: error: File F is 143.41 MB; this exceeds GitHub's file size limit of 100.00 MB
$> git diff --cached
$>
The problem is that the file is already part of the historical commit.
You need to get back to the commit and amend it:
# reset to previous commit but keeping content:
git reset --soft "HEAD^"
# potentially modify the tree content
# amend the old commit with the file removed:
git commit --amend
# push:
git push