Connect to the remote if it hasn't been done yet, negotiate with
the remote git which objects are missing, download and index the
packfile.
The .idx file will be created and both it and the packfile with be
renamed to their final name.
If options are specified and this remote is already connected then
the existing remote connection options will be discarded and the
remote will now use the new options.
Download and index the packfile
Connect to the remote if it hasn't been done yet, negotiate with the remote git which objects are missing, download and index the packfile.
The .idx file will be created and both it and the packfile with be renamed to their final name.
If options are specified and this remote is already connected then the existing remote connection options will be discarded and the remote will now use the new options.