Merge "Improve how "likely an AOSP change" is detected" am: 0b0c098d36 am: 17ac2e2d80

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1948796

Change-Id: I564a443788f94a01c452b9a68d0317bd799ca0a9
diff --git a/tools/aosp/aosp_sha.sh b/tools/aosp/aosp_sha.sh
index 36bea57..95b43cd 100755
--- a/tools/aosp/aosp_sha.sh
+++ b/tools/aosp/aosp_sha.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 LOCAL_DIR="$( dirname "${BASH_SOURCE}" )"
 
-if git branch -vv | grep -q -E "^\*[^\[]+\[aosp/"; then
+if git log -n 1 --format='%D' HEAD@{upstream} | grep -q aosp/; then
     # Change appears to be in AOSP
     exit 0
 elif git log -n 1 --format='%B' $1 | grep -q -E "^Ignore-AOSP-First: .+" ; then