Re: [PATCH 1/3] commit-graph: let commit graph respect commit graft

> From: ZheNing Hu <adlternative@gmail.com>
> 
> In repo_parse_commit_internal(), if we want to use
> commit graph, it will call parse_commit_in_graph() to
> parse commit's content from commit graph, otherwise
> call repo_read_object_file() to parse commit's content
> from commit object.
> 
> repo_read_object_file() will respect commit graft,
> which can correctly amend commit's parents. But
> parse_commit_in_graph() not. Inconsistencies here may
> result in incorrect processing of shallow clone.
> 
> So let parse_commit_in_graph() respect commit graft as
> repo_read_object_file() does, which can solve this problem.