Limit git rev-list to one result

change/change-f0bd1776-bc07-4c5d-b8f9-04a5728eef3b.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "type": "patch",
+      "comment": "Limit git rev-list to one result",
+      "packageName": "workspace-tools",
+      "email": "rsiemens@microsoft.com",
+      "dependentChangeType": "patch"
+    }
+  ]
+}

packages/workspace-tools/src/git/gitUtilities.ts

@@ -150,10 +150,10 @@ export function getCurrentHash(cwd: string) {
  * Get the commit hash in which the file was first added.
  */
 export function getFileAddedHash(filename: string, cwd: string) {
-  const results = git(["rev-list", "HEAD", filename], { cwd });
+  const results = git(["rev-list", "--max-count=1", "HEAD", filename], { cwd });
 
   if (results.success) {
-    return results.stdout.trim().split("\n").slice(-1)[0];
+    return results.stdout.trim();
   }
 
   return undefined;