Function write_commit_log_patch 

pub fn write_commit_log_patch<W: Write>(
    repo: &Repository,
    out: &mut W,
    oid: &ObjectId,
    opts: &LogPatchOptions,
) -> Result<()>

Write one commit in git log -p --no-color --format=%H shape (no patch for merges).

Errors

Propagates ODB read, tree diff, and I/O errors.