github undo last pushed commit with code examples

As a developer, you may find yourself in a situation where you have pushed a commit to a remote repository on GitHub, only to realize that you made a mistake in your code. This mistake could be something as small as a typo or as major as a security vulnerability. Either way, you need to undo the last pushed commit to fix the issue. In this article, we will explore several methods for undoing a last pushed commit on GitHub and provide code examples to help you implement these techniques.

Method 1: Git Revert

One of the most common methods for undoing a last pushed commit is using the git revert command. This command creates a new commit that undoes all the changes made in the last pushed commit. This method is safer than other methods because it does not modify the commit history, which could cause issues if other developers are working on the same project.

Here are the steps to use git revert:

Step 1: Open the command-line interface (CLI) on your computer and navigate to your local repository.

Step 2: Use the git log command to get the SHA hash of the last pushed commit you want to undo. You can use the following command to get the SHA hash:

git log --oneline

Step 3: Use the git revert command to create a new commit that undoes the changes made in the last pushed commit. You can use the following command:

git revert <SHA hash>

Step 4: Push the new commit to the remote repository on GitHub. You can use the following command:

git push origin master

Here is an example of how to use git revert:

$ git log --oneline
e28b7e0 (HEAD -> master, origin/master) Fixed typo in README.md
7b51195 Added new feature to app
476356a Initial commit

$ git revert e28b7e0

$ git log --oneline
f4f03a2 (HEAD -> master) Revert "Fixed typo in README.md"
e28b7e0 Fixed typo in README.md
7b51195 Added new feature to app
476356a Initial commit

$ git push origin master

Method 2: Git Reset

Another method for undoing a last pushed commit is using the git reset command. This command completely removes the last pushed commit from the commit history. This method is more drastic than git revert because it can cause issues if other developers are working on the same project.

Here are the steps to use git reset:

Step 1: Open the command-line interface (CLI) on your computer and navigate to your local repository.

Step 2: Use the git log command to get the SHA hash of the last pushed commit you want to undo. You can use the following command to get the SHA hash:

git log --oneline

Step 3: Use the git reset command to remove the last pushed commit from the commit history. You can use the following command:

git reset --hard HEAD~1

Step 4: Force push the changes to the remote repository on GitHub. You can use the following command:

git push --force origin master

Here is an example of how to use git reset:

$ git log --oneline
e28b7e0 (HEAD -> master, origin/master) Fixed typo in README.md
7b51195 Added new feature to app
476356a Initial commit

$ git reset --hard HEAD~1

$ git log --oneline
7b51195 Added new feature to app
476356a Initial commit

$ git push --force origin master

Method 3: GitHub Desktop

If using the command-line interface is not your thing, you can use GitHub Desktop to undo a last pushed commit. GitHub Desktop is a graphical user interface that simplifies Git operations, making it easier to perform common tasks.

Here are the steps to use GitHub Desktop:

Step 1: Open GitHub Desktop and select the repository you want to undo the last pushed commit for.

Step 2: Click on the "Changes" tab on the left panel.

Step 3: Select the commit you want to undo.

Step 4: Click on the "Undo" button.

Step 5: Commit the changes and push them to the remote repository.

Here is an example of how to use GitHub Desktop:

GitHub Desktop Example

Conclusion

In this article, we explored three methods for undoing a last pushed commit on GitHub: git revert, git reset, and GitHub Desktop. Each method has its own benefits and drawbacks, so it's important to choose the method that works best for your particular situation. Regardless of the method you choose, it's important to remember that undoing a last pushed commit can have unintended consequences, so be sure to communicate with your team and take appropriate precautions. By following these guidelines, you should be able to undo a last pushed commit on GitHub with confidence!

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Popular questions

Certainly, here are five common questions developers may have about undoing last pushed commit on GitHub, along with answers and code examples:

  1. What is the difference between git revert and git reset when undoing a last pushed commit?

Answer: git revert creates a new commit that undoes the changes made in the last pushed commit, leaving the commit history intact. On the other hand, git reset completely removes the last pushed commit from the commit history, which can cause issues if other developers are working on the same project.

Example:

# Undo with 'git revert'
$ git revert abcd1234
$ git push origin master

# Undo with 'git reset'
$ git reset --hard HEAD~1
$ git push --force origin master
  1. Will using git reset to undo a last pushed commit cause issues for other developers working on the same project?

Answer: Yes, using git reset to undo a last pushed commit can cause issues for other developers if they have already pulled the changes from the remote repository. This is because git reset completely removes the last pushed commit from the commit history, which can create conflicts when other developers try to push their changes to the remote repository.

Example:

# Using 'git reset' to undo a last pushed commit
$ git reset --hard HEAD~1
$ git push --force origin master
  1. How can I use GitHub Desktop to undo a last pushed commit?

Answer: To use GitHub Desktop to undo a last pushed commit, open GitHub Desktop, select the repository you want to undo the last pushed commit for, click on the "Changes" tab on the left panel, select the commit you want to undo, click on the "Undo" button, commit the changes and push them to the remote repository.

Example:

GitHub Desktop Example

  1. What should I do if I accidentally use git reset to undo a last pushed commit and cause issues for other developers?

Answer: If you accidentally use git reset to undo a last pushed commit and cause issues for other developers, the best course of action is to communicate with your team and work together to resolve any conflicts. You may need to revert the merge commit, cherry-pick specific changes, or rewrite the commit history to resolve any issues.

Example:

# Communicate with your team and work together to resolve conflicts
$ git revert <merge commit>
$ git cherry-pick <specific changes>
$ git filter-branch --force --tree-filter 'rm <file>' HEAD
$ git push --force origin master
  1. Can I undo multiple last pushed commits at once?

Answer: Yes, you can use git revert or git reset to undo multiple last pushed commits at once by specifying the range of commits to undo. However, it's important to communicate with your team and carefully review the changes before pushing them to the remote repository to avoid causing issues.

Example:

# Using 'git revert' to undo multiple last pushed commits
$ git revert HEAD~3..HEAD
$ git push origin master

# Using 'git reset' to undo multiple last pushed commits
$ git reset --hard HEAD~3
$ git push --force origin master

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