Include the refs belonging to each siva file to the PGA index

[vmarkovtsev]

The current PGA index format does not allow to understand under which references a given URL is written. For example, tensorflow/tensorflow belongs to 2 siva files, the first has two heads and the second - tens. I need to have the full references collection in the second CSV column, e.g.

"c19e4a1b8c7f458fa4d6b0978e2a14ef8c2a2ff2.siva[refs/heads/<uuid>,refs/whatever/<uuid>],f41959ccb2d9d4c722fe8fc3351401d53bcf4900.siva[refs/heads/<uuid>,...]"

[jfontan]

UUID for each repository in the siva files can be found as remote data. The name of the remote is the UUID that can be used to filter repositories and you can identify them by its endpoint. References can be filtered with this regexp .*\/<uuid>$.

[vmarkovtsev]

I will collect the mapping and include it in the dataset because this is a common issue for the team.

[vmarkovtsev]

Done: heads.csv.gz

cc/ @r0mainK

[vmarkovtsev]

I need to update the dataset on Monday.