diff --git a/build/utils.js b/build/utils.js
index b23cece6..2af1bbcf 100644
--- a/build/utils.js
+++ b/build/utils.js
@@ -145,3 +145,72 @@ function dts(_source, _destination, namespace) {
 	prettier(_destination);
 }
 exports.dts = dts;
+
+function getGitVersion() {
+	const git = path.join(REPO_ROOT, '.git');
+	const headPath = path.join(git, 'HEAD');
+	let head;
+
+	try {
+		head = fs.readFileSync(headPath, 'utf8').trim();
+	} catch (e) {
+		return void 0;
+	}
+
+	if (/^[0-9a-f]{40}$/i.test(head)) {
+		return head;
+	}
+
+	const refMatch = /^ref: (.*)$/.exec(head);
+
+	if (!refMatch) {
+		return void 0;
+	}
+
+	const ref = refMatch[1];
+	const refPath = path.join(git, ref);
+
+	try {
+		return fs.readFileSync(refPath, 'utf8').trim();
+	} catch (e) {
+		// noop
+	}
+
+	const packedRefsPath = path.join(git, 'packed-refs');
+	let refsRaw;
+
+	try {
+		refsRaw = fs.readFileSync(packedRefsPath, 'utf8').trim();
+	} catch (e) {
+		return void 0;
+	}
+
+	const refsRegex = /^([0-9a-f]{40})\s+(.+)$/gm;
+	let refsMatch;
+	const refs = {};
+
+	while (refsMatch = refsRegex.exec(refsRaw)) {
+		refs[refsMatch[2]] = refsMatch[1];
+	}
+
+	return refs[ref];
+}
+
+function getBundledFileHeader() {
+	const sha1 = getGitVersion();
+	const semver = require('../package.json').version;
+	const headerVersion = semver + '(' + sha1 + ')';
+
+	const BUNDLED_FILE_HEADER = [
+		'/*!-----------------------------------------------------------------------------',
+		' * Copyright (c) Microsoft Corporation. All rights reserved.',
+		' * Version: ' + headerVersion,
+		' * Released under the MIT license',
+		' * https://github.com/microsoft/monaco-editor/blob/main/LICENSE.txt',
+		' *-----------------------------------------------------------------------------*/',
+		''
+	].join('\n');
+
+	return BUNDLED_FILE_HEADER;
+}
+exports.getBundledFileHeader = getBundledFileHeader;
diff --git a/monaco-css/scripts/bundle.js b/monaco-css/scripts/bundle.js
index a37d11f0..71accd85 100644
--- a/monaco-css/scripts/bundle.js
+++ b/monaco-css/scripts/bundle.js
@@ -6,24 +6,12 @@
 const requirejs = require('requirejs');
 const path = require('path');
 const fs = require('fs');
-const Terser = require('terser');
-const helpers = require('monaco-plugin-helpers');
+const terser = require('terser');
+const { getBundledFileHeader } = require('../../build/utils');
 
 const REPO_ROOT = path.resolve(__dirname, '..', '..');
 
-const sha1 = helpers.getGitVersion(REPO_ROOT);
-const semver = require('../../package.json').version;
-const headerVersion = semver + '(' + sha1 + ')';
-
-const BUNDLED_FILE_HEADER = [
-	'/*!-----------------------------------------------------------------------------',
-	' * Copyright (c) Microsoft Corporation. All rights reserved.',
-	' * Version: ' + headerVersion,
-	' * Released under the MIT license',
-	' * https://github.com/microsoft/monaco-editor/blob/main/LICENSE.txt',
-	' *-----------------------------------------------------------------------------*/',
-	''
-].join('\n');
+const BUNDLED_FILE_HEADER = getBundledFileHeader();
 
 bundleOne('monaco.contribution');
 bundleOne('cssMode', ['vs/language/css/monaco.contribution']);
@@ -76,7 +64,7 @@ function bundleOne(moduleId, exclude) {
 			const fileContents = fs.readFileSync(devFilePath).toString();
 			console.log();
 			console.log(`Minifying ${devFilePath}...`);
-			const result = await Terser.minify(fileContents, {
+			const result = await terser.minify(fileContents, {
 				output: {
 					comments: 'some'
 				}
diff --git a/monaco-html/scripts/bundle.js b/monaco-html/scripts/bundle.js
index 82a594bf..f87e9353 100644
--- a/monaco-html/scripts/bundle.js
+++ b/monaco-html/scripts/bundle.js
@@ -1,24 +1,17 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
 const requirejs = require('requirejs');
 const path = require('path');
 const fs = require('fs');
 const terser = require('terser');
-const helpers = require('monaco-plugin-helpers');
+const { getBundledFileHeader } = require('../../build/utils');
 
 const REPO_ROOT = path.resolve(__dirname, '..', '..');
 
-const sha1 = helpers.getGitVersion(REPO_ROOT);
-const semver = require('../../package.json').version;
-const headerVersion = semver + '(' + sha1 + ')';
-
-const BUNDLED_FILE_HEADER = [
-	'/*!-----------------------------------------------------------------------------',
-	' * Copyright (c) Microsoft Corporation. All rights reserved.',
-	' * Version: ' + headerVersion,
-	' * Released under the MIT license',
-	' * https://github.com/microsoft/monaco-editor/blob/main/LICENSE.txt',
-	' *-----------------------------------------------------------------------------*/',
-	''
-].join('\n');
+const BUNDLED_FILE_HEADER = getBundledFileHeader();
 
 bundleOne('monaco.contribution');
 bundleOne('htmlMode', ['vs/language/html/monaco.contribution']);