Hash out storage of git repositories on disk?

Hi,

| ubuntu@juju-86e177-prod-turku-6:/media/turku_storage_2-turku_storage/07b54da4-eeb0-41ed-8ce8-5e5dca2e3759/git.snapshots/latest$ ls . | grep -v 'ephemeral '| wc -l
| 104277

Is it possible to hash these out to separate directories? Something similar to bzr? e.g. ubuntu-cve-tracker (30355) would be '3/0/30355' on disk.

This is so we can easily split out our backups to multiple concurrent jobs. Right now, we're excluding all and including specific things such as 1*, 2*, etc.