Is it possible to revoke commits?

Question

Assume we have a repository and 5 commits:

• commit 1
• commit 2
• commit 3
• commit 4
• commit 5

And now I realize commits 4 and 5 are a bad idea. I want to completely remove all changes committed in commit 4 and 5. How to do it?

Answer 1

git revert commit_hash

It reverts given commit. Note that revert is another commit which discards changes from commit_hash, not removing given commit from repository.