git rebase

git reflog
    3213216 (HEAD -> master, origin/master, origin/HEAD) HEAD@{0}
    5c2d647 HEAD@{1}: commit: bla
    43840f6 HEAD@{2}: commit: bla
    a5c253b HEAD@{3}: commit: bla
    a5c253b HEAD@{4}: commit: bla
    0c048a4 HEAD@{5}: commit: bla
    2309edc HEAD@{6}: commit: errorneous commit

git rebase -i HEAD~6

    pick 3213216 (HEAD -> master, origin/master, origin/HEAD) HEAD@{0}
    pick 5c2d647 HEAD@{1}: commit: bla
    pick 43840f6 HEAD@{2}: commit: bla
    pick a5c253b HEAD@{3}: commit: bla
    pick a5c253b HEAD@{4}: commit: bla
    pick 0c048a4 HEAD@{5}: commit: bla
    edit 2309edc HEAD@{6}: commit: errorneous commit

git commit --amend
git rebase --continue