Add new changes to any commit

Question

Sometimes when I have done some changes (git diff) I want part of them (only particular files) add to older commit.

What is the easiest way to do it?

Answer 1

You could add the changes you would like to merge in an older commit like this

git add [path] or git add -p

then create a fixup commit with the hash of the commit you would like to move those changes

an example:

git commit --fixup [commit hash]

To merge these 2 commits into 1 you will finally need to do interactive rebase

git rebase -i origin/[branch name] --autosquash

Be ware that you have to force push (with caution) after an interactive rebase

git push -f