gistfile1.txt

   (master)
  A---B---C---E---F
           \
            D---G---H
            (feature)

  git rebase --onto master D feature

   (master)
            D---G---H
           /
  A---B---C---E---F
                   \
                    G'---H'
                    (feature)

  git co master && git merge feature


  (master)
  A---B---C---E---F---G'---H'