Merge "The --why parameter in whichgit should be optional" am: fe7277fd am:...

Merge "The --why parameter in whichgit should be optional" am: fe7277fd am: 05f2e3aa am: 8539ca6e

Original change: https://android-review.googlesource.com/c/platform/build/+/2266588



Change-Id: I8361b743e4bcf7dfe50701d2ac1dfd026e788717
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>