The most important git command you need to know.

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The git reflog command is used to show a log of all the changes that have been made to the local branch refs. This includes branch updates, branch creation and deletion, and switching branches. The git reflog command can be useful when you want to see the history of changes made to your local branches, or when you want to recover a branch or a commit that was accidentally deleted or lost.

To use the git reflog command, simply run it in your terminal or command prompt from within your local git repository. For example:

git reflog

This will show a log of all the changes that have been made to your local branch refs, including branch updates, creation and deletion, and switching branches. Each entry in the log will include the SHA-1 hash of the commit, the ref that was updated, and the action that was taken (e.g. branch update, branch creation, branch deletion, etc.).

But why is it so important?

You can use the git reflog command to recover a branch or commit that was lost or deleted. For example, if you accidentally deleted a branch and want to recover it, you can use the git reflog command to find the SHA-1 hash of the commit where the branch was deleted, and then use the git branch command to recreate the branch from that commit.

In summary, the git reflog command is used to show a log of all the changes that have been made to the local branch refs, and can be useful when you want to recover a lost or deleted branch or commit.