i.e., we want to switch from the current flat view of branches:
swhfs/archive/swh:1:snp:2ca5d6eff8f04a671c0d5b13646cede522c64b7d $ ls | head -n 5 HEAD refs%2Fheads%2F386BSD-0.0-Snapshot-Development refs%2Fheads%2F386BSD-0.1-patchkit refs%2Fheads%2F386BSD-0.1-patchkit-Import refs%2Fheads%2F386BSD-0.1-Snapshot-Development
to nested sub-directories following the "/" present in branch names, like this:
HEAD refs/heads/386BSD-0.0-Snapshot-Development refs/heads/386BSD-0.1-patchkit refs/heads/386BSD-0.1-patchkit-Import refs/heads/386BSD-0.1-Snapshot-Development