It depends on how your git tree looks. For example, a merge may have two or more parents. Depending on this, your latch may have several grandparents.
You probably need to reinstall using
git rebase -i HEAD^1^2 git rebase -i HEAD^2^1 git rebase -i HEAD^2^2
(one of these three).
See here for more details on relative git commit.
Willem van onsem
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