ref: 040b572d95e4ca27e1ada6113c405b8a1eb4a669 dir: /packfile/ingest/testdata/fixtures/sha1/METADATA.txt/
format=sha1 head=200c960359dad025b4170284c518919eb4a24305 base=4bc507fc631ea78474d83c47548743c9f1dda0dc