Cannot ingest git repositories with (too) large packfiles

There exists origins whose packfiles when ingested would fail ingestion because the packfiles retrieved is too big.

One example si the chromium repository: https://github.com/chromium/chromium

We need to be able to ingest those as well.

We should consider fetching the missing data into packfiles instead of a large one.

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Migrated from T3652 (view on Phabricator)