ref: 1a8842b33d6d83d1754267e087fd7b4f73ca9e91 dir: /packfile/ingest/testdata/fixtures/sha1/METADATA.txt/
format=sha1 head=200c960359dad025b4170284c518919eb4a24305 base=4bc507fc631ea78474d83c47548743c9f1dda0dc