Difference Between Git remote prune, Git prune and Git fetch --prune

Git is a version control system that helps developers manage and track changes in their codebase. Among its many commands, git remote prune, git prune, and git fetch --prune are essential for maintaining a clean and organized repository. This article will explain the differences between these commands, their syntax, uses, and provide examples to illustrate their functionalities.

What is git remote prune?

git remote prune is a command used to clean up references to remote branches that no longer exist in the remote repository.

Syntax

git remote prune <remote-name>

Uses of git remote prune

• To remove stale references to remote branches that have been deleted from the remote repository.
• Helps to keep your local repository clean and up-to-date with the remote repository.

Example

# Prune stale remote-tracking branches from origin
git remote prune origin

This command will remove any branches in your local repository that no longer exist on the remote named origin.

What is git prune?

git prune is a low-level Git command that removes objects that are no longer referenced by any object in the repository. This is useful for cleaning up unnecessary objects that can accumulate over time.

Syntax

git prune

Uses of git prune

• To clean up unreachable objects from the repository.
• Helps reduce the size of the repository by removing unnecessary objects.

Example

# Prune all unreachable objects from the repository
git prune

This command will remove all objects that are not reachable from any branch or tag in the repository.

What is git fetch --prune?

git fetch --prune is a command that combines the functionality of git fetch and git remote prune. It fetches updates from the remote repository and removes any remote-tracking branches that no longer exist on the remote.

Syntax

git fetch --prune <remote-name>

Uses of git fetch --prune

• To update your local repository with the latest changes from the remote repository.
• Automatically removes stale remote-tracking branches that have been deleted from the remote.

Example

# Fetch updates from origin and prune stale remote-tracking branches
git fetch --prune origin

This command will fetch the latest changes from the origin remote and remove any branches in your local repository that no longer exist on the remote.

Using "prune" on a Remote Repository:

"prune" is available as an option for the `git fetch` and `git remote` commands. ( `git prune` command -  is used during garbage collection.). The easiest way to use prune is to provide it as an option when fetching:

Command: git fetch --prune origin

In cases where you'd like to *only* perform a prune and *not* fetch remote data, you can use it with the `git remote` :

Command: git remote prune origin

The result is the same in both cases: stale references to remote branches that don't exist anymore on the specified remote repository will be deleted. By the way: you never have to worry about your local branches, since prune will never affect those.

clone the same repo twice, so that you properly understand the working of git prune.

git clone repolink

1. create a branch on one  repo and fetch it on its duplicate
2. delete that branch from one repo 
3. when you list the branches on the other repo it will not get updated.

git branch 
git push origin HEAD
git branch -r

use git fetch --prune: 

The branch will be automatically updated in the 2nd repo if we use the prune command to delete

git fetch --prune

Suppose in some cases where you'd like to *only* perform a prune and *not* fetch remote data

git remote prune origin

If you want automatically prune itself

git config —global fetch.prune true

Difference Between Git remote prune, Git prune and Git fetch --prune

Conclusion

Understanding the differences between git remote prune, git prune, and git fetch --prune is important for maintaining a clean and efficient Git repository. Each command serves a unique purpose in managing and organizing your repository. git remote prune focuses on cleaning up remote-tracking branches, git prune removes unreachable objects, and git fetch --prune combines fetching updates with pruning stale branches.