$ git log -1 stable-1.6 -- lib/PublicInbox/ContentId.pm found last record of `lib/PublicInbox/ContentId.pm' in the following commit: 098fecd1 rename "ContentId" to "ContentHash" (2020-05-10)git clone https://public-inbox.org/public-inbox.git git clone http://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/public-inbox.git