SHELL

git see all commits without merge commits

git log --no-merges

git show only merge commits

git log --merges

git log show only merge commits

git log --merges --first-parent master 
        --pretty=format:"%h %<(10,trunc)%aN %C(white)%<(15)%ar%Creset %C(red bold)%<(15)%D%Creset %s"