repository sync-to b2

$ kopia repository sync-to b2 \
        --bucket=... \
        --key-id=... \
        --key=...

Synchronize repository data to another repository in a B2 bucket

Flag	Short	Default	Help
`--bucket`			Name of the B2 bucket
`--[no-]delete`		`false`	Whether to delete blobs present in destination but not source.
`--[no-]dry-run`	`-n`	`false`	Do not perform copying.
`--key`			Secret key (overrides B2_KEY environment variable)
`--key-id`			Key ID (overrides B2_KEY_ID environment variable)
`--max-download-speed`			Limit the download speed.
`--max-upload-speed`			Limit the upload speed.
`--[no-]must-exist`		`false`	Fail if destination does not have repository format blob.
`--parallel`		`1`	Copy parallelism.
`--prefix`			Prefix to use for objects in the bucket
`--[no-]times`		`false`	Synchronize blob times if supported.
`--[no-]update`		`true`	Whether to update blobs present in destination and source if the source is newer.