diff --git a/.github/workflows/release_validation.yaml b/.github/workflows/release_validation.yaml
index b2096be2..280c3ef6 100644
--- a/.github/workflows/release_validation.yaml
+++ b/.github/workflows/release_validation.yaml
@@ -51,10 +51,15 @@ jobs:
       ### Check the version number in the code matches the tag number
       - uses: actions/checkout@v3
 
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
       - name: Retrieve the version number(s)
         run: |
           TAG_VERSION=$GITHUB_REF_NAME
-          CODE_VERSION=$(git describe --tags)
+          CODE_VERSION=$(python3 scripts/auto_fw_version.py | grep -E 'BUILD_TAG=([^ ]+)' -o | cut -d= -f2)
           echo TAG_VERSION=$TAG_VERSION >> $GITHUB_ENV
           echo CODE_VERSION=$CODE_VERSION >> $GITHUB_ENV
 
diff --git a/scripts/auto_fw_version.py b/scripts/auto_fw_version.py
index 8042366c..03daf783 100644
--- a/scripts/auto_fw_version.py
+++ b/scripts/auto_fw_version.py
@@ -1,18 +1,39 @@
 import subprocess
 import os
 
-Import("env")
+def get_build_flag():
+    ret = subprocess.run(["git", "rev-parse", "HEAD"], stdout=subprocess.PIPE, text=True) #Uses any tags
+    full_hash = ret.stdout.strip()
+    short_hash = full_hash[:8]
 
+    build_version = "local_" + short_hash
 
+    # get the GITHUB_REF_NAME
+    ref_name = os.environ.get('GITHUB_REF_NAME')
+    if ref_name:
+        if ref_name.startswith("v"):
+            build_version = ref_name
+        else:
+            build_version = ref_name + "_" + short_hash
 
-def get_build_flag():
-    #ret = subprocess.run(["git", "describe"], stdout=subprocess.PIPE, text=True) #Uses only annotated tags
-    ret = subprocess.run(["git", "describe", "--tags"], stdout=subprocess.PIPE, text=True) #Uses any tags
-    build_version = ret.stdout.strip()
-    build_flag = "-D BUILD_TAG=" + build_version
-    print ("Firmware Revision: " + build_flag)
-    return (build_flag)
-
-env.Append(
-    BUILD_FLAGS=[get_build_flag()]
-)
\ No newline at end of file
+    # Check if the source has been modified since the last commit
+    ret = subprocess.run(["git", "diff-index", "--quiet", "HEAD", "--"], stdout=subprocess.PIPE, text=True)
+    if ret.returncode != 0:
+        build_version += "_modified"
+        short_hash += "_modified"
+        full_hash += "_modified"
+
+    build_flags = "-D BUILD_TAG=" + build_version + " " + "-D BUILD_HASH=" + short_hash + ""
+
+    return build_flags
+
+build_flags = get_build_flag()
+
+if "SCons.Script" == __name__:
+    print ("Firmware Revision: " + build_flags)
+    Import("env")
+    env.Append(
+        BUILD_FLAGS=[get_build_flag()]
+    )
+elif "__main__" == __name__:
+    print(build_flags)
diff --git a/src/main.cpp b/src/main.cpp
index c0dcf49c..e7ebf171 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -106,6 +106,7 @@ void setup()
   DEBUG.println();
   DEBUG.printf("OpenEVSE WiFI %s\n", ESPAL.getShortId().c_str());
   DEBUG.printf("Firmware: %s\n", currentfirmware.c_str());
+  DEBUG.printf("Git Hash: " ESCAPEQUOTE(BUILD_HASH) "\n");
   DEBUG.printf("Build date: " __DATE__ " " __TIME__ "\n");
   DEBUG.printf("IDF version: %s\n", ESP.getSdkVersion());
   DEBUG.printf("Free: %d\n", ESPAL.getFreeHeap());