Break commit into multiple commits

commit reset interactive edit

Source

• https://stackoverflow.com/a/6217314/12780516

Split the most recent commit

git reset HEAD~

• then commit the pieces individually as usual

Split an older commit (during a rebase)

git rebase -i <commit-ish>

• in the rebase editor select edit for the commit to be split; save and close
• you should now be at the correct point in the commit history, so again

git reset HEAD~

• and again, commit the pieces individually as usual