static-checks.sh: Show the exact commits being tested

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ie89b3c44a9eb1d7cffda2b5c9a6daf7b86294764
(cherry picked from commit 74cf0f1ef73291f4b0255b6e3bc6bee0b473155b)
diff --git a/script/static-checks/common.sh b/script/static-checks/common.sh
new file mode 100644
index 0000000..34aa53e
--- /dev/null
+++ b/script/static-checks/common.sh
@@ -0,0 +1,14 @@
+#
+# Copyright (c) 2024 Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+function get_base_branch() {
+    # Remove prefix
+    echo origin/${TF_GERRIT_BRANCH#refs/heads/}
+}
+
+function get_merge_base() {
+    git merge-base HEAD $(get_base_branch) | head -1
+}
diff --git a/script/static-checks/static-checks.sh b/script/static-checks/static-checks.sh
index 133ba46..ffd58f2 100755
--- a/script/static-checks/static-checks.sh
+++ b/script/static-checks/static-checks.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Copyright (c) 2019-2020 Arm Limited. All rights reserved.
+# Copyright (c) 2019-2024 Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -15,6 +15,8 @@
 export CI_ROOT=$(pwd)
 cd -
 
+. $CI_ROOT/script/static-checks/common.sh
+
 # Initialize log file
 
 export LOG_TEST_FILENAME=$(pwd)/static-checks.log
@@ -26,6 +28,14 @@
 echo "###### Static checks ######" > "$LOG_TEST_FILENAME"
 echo >> "$LOG_TEST_FILENAME"
 
+echo "Patch series being checked:" >> "$LOG_TEST_FILENAME"
+git log --oneline $(get_merge_base)..HEAD >> "$LOG_TEST_FILENAME"
+echo >> "$LOG_TEST_FILENAME"
+echo "Base branch reference commit:" >> "$LOG_TEST_FILENAME"
+git log --oneline -1 $(get_merge_base) >> "$LOG_TEST_FILENAME"
+
+echo >> "$LOG_TEST_FILENAME"
+
 # Reset error counters
 
 ERROR_COUNT=0