How to roll back the pull operation in git

With the widespread use of Git, many developers have encountered unexpected merges, especially during pull operations. In this case, a simple solution is to return to the original state and then start a new branch again, so as to avoid the impact of wrong merges on the project. In this article, we will show you how to roll back a pull operation.

What is the pull operation

First of all, we need to clarify the concept of the pull operation. Pull means getting the latest version from the remote repository and merging it into the local branch. Generally, we use the following command to pull:

git pull origin master

The above command means to get the latest version from the master branch of the remote warehouse origin and merge it into the local master branch. If there are uncommitted changes on the local branch at this time, the changes must be committed and conflicts resolved before the pull operation can be performed.

Quick rollback pull operation

If you only need to roll back to the latest commit, you can use the git reset command, as shown below:

git reset --hard HEAD^

The above command will reset (Rewind) the most recent commit. We have to use the --hard parameter to overwrite local changes, so make sure you have a backup of your changes.

If you want to roll back to any one of multiple submissions, you can use the commit ID as a parameter. For example, the following command will roll back to the commit with commit ID 123456:

git reset --hard 123456

Please note that this command will overwrite all previous changes, please operate with caution.

Rollback to the remote branch

When we make a wrong merge, we may need to rollback to the remote branch. In this case, upon reset, we will lose all previously merged changes. In order to roll back to the remote branch, we can use the following command:

git reset --hard origin/master

The above code will reset the local branch to the master branch of the remote warehouse. Please note that this command will also overwrite all previous changes, so proceed with caution.

Reject merge (commit rejection)

Sometimes, after performing a merge operation, we may need to reject the merge and continue with other operations. In this case, we can use the following command:

git revert -m 1 <commit-hash>

This command will undo the previous commit. If there are two or more parent merge commits, you must use the -m 1 parameter to specify the primary commit. Sometimes, we need to merge multiple commits, this command is very practical.

Keep certain changes

Before rolling back, sometimes we need to keep certain changes. In this case, we can use the following command:

git stash

The above command stores the current working directory and index status in the stack and clears the current status. This means that we can safely perform reset/rollback operations without getting conflicting effects from other changes. After getting the changes, we can revert them using the following command:

git stash apply

This will restore the saved changes to the working directory and merge the results into the index.

Summary

As mentioned above, there are many ways to roll back a pull operation, each method is different and may require different steps. Before rolling back, make sure you have backed up all changes and confirmed your rollback method. If you're unsure, back up all changes and consult with a member of your team or a more experienced colleague before proceeding.

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