pub fn commit_tree_at_head(
git_dir: impl AsRef<Path>,
format: ObjectFormat,
tree: ObjectId,
options: CommitIndexOptions,
) -> Result<CommitIndexResult>pub fn commit_tree_at_head(
git_dir: impl AsRef<Path>,
format: ObjectFormat,
tree: ObjectId,
options: CommitIndexOptions,
) -> Result<CommitIndexResult>