S1---S2---…---S31  staging
             /
A---B---…---X  dev

              P1---P2---P3---P4---P5  production

git checkout -b temp dev
git merge production --squash
git branch -f production
git checkout -B temp dev
git merge staging --squash
git branch -f staging

S  staging, temp
             /
A---B---…---X  dev

              P  production

git checkout -B temp <commit id for A>
git merge production --squash
git branch -f production
git checkout -B temp <commit id for A>
git merge staging --squash
git branch -f staging
git checkout -B temp <commit id for A>
git merge dev --squash
git branch -f dev
git branch -D temp
git push -f --all

S'  staging
 /
A---X'  dev

  P'  production