libgit2/pygit2 — pull request #445 by carlosmn (2014-10-30 14:06:07+00:00)
Title: Add Repository.merge_commits()

This allows you to merge arbitrary commits, returning an index, which is
useful when dealing with bare repos in which we want to merge.

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I don't need to use the options in my use-case at the moment, but the structures are there in case anybody does want to add them.