git-prune-packed - Remove extra objects that are already in pack files
git prune-packed [-n|--dry-run] [-q|--quiet]
This program searches the $GIT_OBJECT_DIRECTORY for all objects that currently exist in a pack file as well as the independent object directories.
All such extra objects are removed.
A pack is a collection of objects, individually compressed, with delta compression applied, stored in a single file, with an associated index file.
Packs are used to reduce the load on mirror systems, backup engines, disk storage, etc.
Don’t actually remove any objects, only show those that would have been removed.
Squelch the progress indicator.