There is no native "backwards merge" concept in git, as merge commits are inherently forward-moving in the commit history. However, you can find reverse-merging situations or examine the changes introduced by a merge commit in the reverse direction.
To identify reverse-merging situations, you can use the following steps:
git show --summary reverse_merge_commit
To examine the changes introduced by a merge commit in the reverse direction, follow these steps:
git show -m --first-parent merge_commit
This command displays a combined diff showing the changes introduced by the merge commit going in the reverse direction. The
--first-parent flag ensures that only the changes from the first parent commit are shown, effectively ignoring any changes made in the merged branch.
Note that while these steps help you identify possible reverse-merge situations or examine changes in the reverse direction, they do not reverse the merge commit itself.