git clone --bundle-uri: provide progress feedback?

[Xavier Morel <xmo@xxxxxxxx>]

I've been looking at `--bundle-uri` for a repository of some size (~5 
million objects, ~10GB fresh cloned though an aggressive gc get it down 
to under 2), however from a UX perspective it seems to have a bit of an 
issue: while normally `git clone` provides pretty extensive progress 
feedback as far as I can see there is no feedback whatsoever while 
`clone` is interacting with the bundle, even explicitly setting 
`--verbose` and `--progress`, at least when the bundle is a local file.

I assume bundle-uri is mostly intended for large repositories, for which 
even a clone with a bundle uri can take a while, and the lack of any 
sort of feedback until git reaches out to the actual repository to find 
what was not in the bundle is somewhat distressing.

And side-note, it might make sense to emit a warning when trying to 
combine `--bundle-uri` with `--filter`? I assume if any filtering 
happens it happens only on the reconciliation fetch, which should be 
extremely small compared to the bundle's size. Experimentally with a 
sample size of (1) using `--filter=tree:0` with a bundle uri yields a 
larger repository *and* is slower than leaving the filter out.