Don't fetch tags in presubmit
Don't fetch tags in presubmit

The presubmit step does not require tags so avoid them, as fetching
tags implicitly adds a lot of time to the fetch step for repos like
chromium with many many tags.

R=40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org

Recipe-Nontrivial-Roll: build
Bug: 1019824
Change-Id: I741970b8c61bd88bafde6ef30b733e9bfc2c0a34
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1951510
Reviewed-by: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>
Commit-Queue: danakj <c86aaa30b07c5d899d1ba3c6956afd8896053056@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools