[Integrated] RFR: git-fork: use --fast-forward instead of --pull when syncing

[Erik Helin]

Changeset: 6b7e7875
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-02-27 13:13:30 +0000
URL:       https://git.openjdk.java.net/skara/commit/6b7e7875

git-fork: use --fast-forward instead of --pull when syncing

Reviewed-by: rwestberg

! cli/src/main/java/org/openjdk/skara/cli/GitFork.java