Git: How to Add Missing Files to Your Previous Commit

1.First Way

• Go back to previous commit (keep changes in working directory)
  git reset --soft HEAD~1

• Add your missing files
  git add missing-file.txt

• Commit again with all files
  git commit -m "Your original commit message"

• Force push to update remote branch
  git push --force-with-lease

2.Second Way

• Alternative: Amend the last commit

git add missing-file.txt

git commit --amend --no-edit

git push --force-with-lease

3.Third Way

• If you already pushed and want to be safer

git add missing-file.txt

git commit -m "Add missing files"

git push