RFR: Ensure that the seed repo fetches everything when refreshing

[Robin Westberg]

Ensure that the seed repo fetches everything from the correct upstream when refreshing.

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Commit messages:
 - Ensure that the seed repo fetches everything when refreshing

Changes: https://git.openjdk.java.net/skara/pull/881/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=881&range=00
  Stats: 9 lines in 2 files changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/881.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/881/head:pull/881

PR: https://git.openjdk.java.net/skara/pull/881