diff --git a/client/src/utils/ajax.ts b/client/src/utils/ajax.ts
index b284b6924d8..42b06d21cea 100644
--- a/client/src/utils/ajax.ts
+++ b/client/src/utils/ajax.ts
@@ -10,7 +10,7 @@ import type {
   User
 } from '../redux/prop-types';
 
-const { apiLocation } = envData;
+const { apiLocation, gitHash } = envData;
 
 const base = apiLocation;
 
@@ -179,7 +179,7 @@ export function getUserProfile(
   username: string
 ): Promise<ResponseWithData<UserProfileResponse>> {
   const responseWithData = get<{ entities?: ApiUser; result?: string }>(
-    `/api/users/get-public-profile?username=${username}`
+    `/api/users/get-public-profile?username=${username}&githash=${gitHash}`
   );
   return responseWithData.then(({ response, data }) => {
     const { result, user } = parseApiResponseToClientUser({
diff --git a/config/read-env.js b/config/read-env.js
index 50d07fbb1e5..90159d02684 100644
--- a/config/read-env.js
+++ b/config/read-env.js
@@ -1,4 +1,5 @@
 const path = require('path');
+const { execSync } = require('child_process');
 
 const envPath = path.resolve(__dirname, '../.env');
 const { error } = require('dotenv').config({ path: envPath });
@@ -47,6 +48,10 @@ const locations = {
     : radioLocation
 };
 
+// This is used to identify the current deployment and is trimmed to remove
+// the trailing newline.
+const gitHash = execSync('git rev-parse HEAD', { encoding: 'utf8' }).trim();
+
 module.exports = Object.assign(locations, {
   clientLocale,
   curriculumLocale,
@@ -82,5 +87,6 @@ module.exports = Object.assign(locations, {
   growthbookUri:
     !growthbookUri || growthbookUri === 'api_URI_from_Growthbook_dashboard'
       ? null
-      : growthbookUri
+      : growthbookUri,
+  gitHash
 });
diff --git a/tools/scripts/build/ensure-env.ts b/tools/scripts/build/ensure-env.ts
index 53eef16a3fb..9308ee2b91a 100644
--- a/tools/scripts/build/ensure-env.ts
+++ b/tools/scripts/build/ensure-env.ts
@@ -57,13 +57,15 @@ if (FREECODECAMP_NODE_ENV !== 'development') {
   const donationKeys = ['stripePublicKey', 'paypalClientId', 'patreonClientId'];
   const loggingKeys = ['sentryClientDSN'];
   const abTestingKeys = ['growthbookUri'];
+  const diagnosticKeys = ['gitHash'];
 
   const expectedVariables = locationKeys.concat(
     deploymentKeys,
     searchKeys,
     donationKeys,
     loggingKeys,
-    abTestingKeys
+    abTestingKeys,
+    diagnosticKeys
   );
   const actualVariables = Object.keys(env as Record<string, unknown>);
   if (expectedVariables.length !== actualVariables.length) {