How to rollback if the git merge was incorrect?

To revert a Git merge operation, you can follow these steps:

1. Please find the commit ID of the merge operation to be rolled back by running the command “git log” to view the commit history.
2. Use the command ‘git revert -m 1 ‘ to revert a merge commit by specifying its ID. This will generate a new commit that undoes the previous merge operation.
3. Note: the option “-m 1” indicates that the merge commit to be rolled back is a merge on the main branch; if the merge was performed on a different branch, adjust the value of the -m option accordingly.
4. Confirm and submit the rollback operation. Git will create a new commit object for the rollback operation. You can add a relevant commit message to this commit and then submit it using the git commit command.
5. Push the revert operation to the remote repository. Use the git push command to push the revert commit to the remote repository so that others can also retrieve and apply the revert operation.

Please be aware that the rollback operation will create a new commit to undo the previous merge operation, and maintain the history of the rollback commit. If you need to merge the code again later on, make sure to do so in the correct code state.