How do I undo a merge , after I merged a branch into master branch

Question

Guys I want to unmerge this localdevelopment branch from my master branch , also I pushed the master to origin/master , so now the commit history has also changed in the remote where in master branch I am also seeing the commits of this localdevelopment branch because I merged it , I only want the blue dots / commits from the above pic to be shown in the master branch , any fix for this.

Answer 1

git log
copy commit from there and then

git reset --hard "your commit"
git push -f origin master

try this :)