How can I easily fixup a past commit?

Question

I just read amending a single file in a past commit in git but unfortunately the accepted solution \'reorders\' the commits, which is not what I want. So here\'s my question

Answer 1

To fixup one commit :

git commit --fixup a0b1c2d3 .
git rebase --autosquash -i HEAD~2

where a0b1c2d3 is commit that you want fixup and where 2 is the number of commits +1 pasted that you want to change.

Note: git rebase --autosquash without -i doesn't worked but with -i worked, which is strange.