git reset --hard HEAD~1

It deletes the last commit (i.e., the last SHA) in GitHub, but it involves rewriting the commit history and requires using a force push.

Steps to Delete the Last Commit from GitHub:

1. Reset Your Local Repository

To delete the last commit, you can use git reset. If you want to completely remove the commit (including changes), you can perform a hard reset:

git reset --hard HEAD~1

• --hard: This will remove the commit and the changes from your working directory and staging area.
• HEAD~1: This means "go back 1 commit" (i.e., remove the last commit).

If you just want to keep the changes in your working directory (without deleting them completely), you can use --soft or --mixed instead of --hard:

• --soft HEAD~1: Keeps the changes in the staging area.

• --mixed HEAD~1: Keeps the changes in your working directory but removes them from the staging area.

2. Force Push the Changes to GitHub

After performing the reset locally, you need to force-push the changes to overwrite the commit on GitHub:

git push --force

This will remove the last commit from both your local repository and GitHub. Be careful with this, as it rewrites history.

Things to Consider:

• Force-pushing is generally safe when you're working alone, as no one else is depending on the commit history.  However, if you were working in a team, force-pushing could overwrite changes others might have based their work on.
• The commit will be permanently removed from the history on GitHub, unless someone else has already pulled it (in which case, they might still have the commit locally).
• Safety: If you're uncertain, you can make a backup branch before doing the reset:

git branch backup-branch

This way, if anything goes wrong, you can always go back to backup-branch.

Summary:

1. Run git reset --hard HEAD~1 to remove the last commit locally.
2. Use git push --force to remove the commit from GitHub.

That’s it! The last commit will be deleted both locally and remotely.