Main thing I wish for is to have a submodule be easier to set to track a (version) tag. Now I have to lookup what the checksum corresponds to. Maybe also I cou

Main thing I wish for is to have a submodule be easier to set to track a (version) tag. Now I have to lookup what the checksum corresponds to. Maybe also I could set their dirs to be 'read only'; git should refuse any local changes and only accept a direct change of checkout (of hash or tag).