Run Git prepare-commit-msg Hook on Previous Commits

I’ve had some people approach me after adding a git hook I made saying, now that I have the hook in place, how do I fix all my previous commits to use it?!

Once again, I offer some good news! It is possible and easy to run the git hook on your previous commits using Interactive Rebase.

Here is how you fix up all your previous commits to run the pre-commit hook you just added:

Select commit prior to commits you want to run the hook on.
Right-click > Rebase current branch on > Select Commit Hash
Click Show options
Check Interactive Rebase
Press Rebase
Your choosen Text Editor should open with git-rebase-todo window
Add exec git commit --amend -C HEAD after each commit
Close the edit window
Watch git do it’s work!