ref: 1556cfb51d980ae8c5bf664ad69f3abd46f02386 dir: /packfile/ingest/testdata/fixtures/sha1/METADATA.txt/
format=sha1 head=200c960359dad025b4170284c518919eb4a24305 base=4bc507fc631ea78474d83c47548743c9f1dda0dc