Updating pre-prod and production source code on Git requires a few steps to ensure that there are no conflicts between the two versions. we pull the latest version of the production source code from the remote repository. Then, merge the pre-prod code into the production code. This can be done using the Git merge command, which will combine the two branches. Finally, we resolve any conflicts that arise between the two branches. This can be done by manually editing the conflicting files or using a merge tool to help you identify and resolve the differences. Once the conflicts have been resolved, we can commit the changes to the remote repository and push the updated version of the production source code to the remote repository. This will ensure that the pre-prod and production branches are in sync and that any conflicts have been resolved.