Function libgit2_sys::git_commit_amend

pub unsafe extern fn git_commit_amend(id: *mut git_oid,
                                      commit_to_amend: *const git_commit,
                                      update_ref: *const c_char,
                                      author: *const git_signature,
                                      committer: *const git_signature,
                                      message_encoding: *const c_char,
                                      message: *const c_char,
                                      tree: *const git_tree)
                                      -> c_int