Re: Doing blobless clone by default; switching between blobless, treeless and full clones by a command

> Rationale:
> 
> The reason people execute  git clone  is hardly to issue immediately
> afterwards  git log  or  git annotate.  The reason for git clone is to (try
> changing something and then) build the software. (Provided that git manages
> source code.)  Doing by default a reduced data download with  git clone
> will sped up the initialization, it will save bytes in transit and reduce
> server load.  In fact I think that by default (without extra configuration)
> git clone  should do a reduced download (blobless) and git should download
> the other things, when asked to do so.  This default download preference
> should be ideally managed by an option in global gitconfig .  When looking
> at https://git-scm.com/docs/git-config for “filter” I do not recognize
> anything relevant.