How to Access a Previous Commit with Git 🌱

git revert <hash-or-ref>

• This command creates a new commit that undoes the changes from a previous commit. This command adds new history to the project (it doesn’t modify existing history).

git checkout -b <branch_name> <hash-or-ref>

• This command creates a new branch that points to a previous commit of yours.
• Using git checkout <hash-or-ref> instead would set you on a detached HEAD. This is because it would set the HEAD (the part of git that tracks what your current working directory should match) to point directly to a commit rather than a separate branch. So, as soon as you checkout a new branch or tag, the detached commits will be “lost” (because HEAD has moved)
• If you have modified a file in your working tree, but haven’t committed the change, then you can use git checkout to checkout a fresh-from-repository copy of the file.

Use git log to get the hash to a previous commit

Merging

Running git merge <branch_to_be_merged_in_to_current_branch> merges the branch you put in the argument into the current branch you are located in.