git count-objects [-v] [-H | --human-readable]
count: the number of loose objects
size: disk space consumed by loose objects, in KiB (unless -H is specified)
in-pack: the number of in-pack objects
size-pack: disk space consumed by the packs, in KiB (unless -H is specified)
prune-packable: the number of loose objects that are also present in the packs. These objects could be pruned using git prune-packed.
garbage: the number of files in object database that are neither valid loose objects nor valid packs
size-garbage: disk space consumed by garbage files, in KiB (unless -H is specified)
alternate: absolute path of alternate object databases; may appear multiple times, one line per path. Note that if the path contains non-printable characters, it may be surrounded by double-quotes and contain C-style backslashed escape sequences.