lifo:1,
topo_order:1,
simplify_merges:1,
+ simplify_by_decoration:1,
tag_objects:1,
tree_objects:1,
blob_objects:1,
left_right:1,
rewrite_parents:1,
print_parents:1,
+ show_source:1,
+ show_decorations:1,
reverse:1,
+ reverse_output_stage:1,
cherry_pick:1,
first_parent_only:1;