[Integrated] RFR: webrev: do not fetch remote branches

[Erik Helin]

Changeset: 629d2f85
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-04-03 12:52:17 +0000
URL:       https://git.openjdk.java.net/skara/commit/629d2f85

webrev: do not fetch remote branches

Reviewed-by: rwestberg

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