Adds another git warning

src/git/git.ts

@@ -61,7 +61,8 @@ const GitWarnings = {
     foundButNotInRevision: /Path \'.*?\' exists on disk, but not in/i,
     headNotABranch: /HEAD does not point to a branch/i,
     noUpstream: /no upstream configured for branch \'(.*?)\'/i,
-    unknownRevision: /ambiguous argument \'.*?\': unknown revision or path not in the working tree|not stored as a remote-tracking branch/i
+    unknownRevision: /ambiguous argument \'.*?\': unknown revision or path not in the working tree|not stored as a remote-tracking branch/i,
+    mustRunInWorkTree: /this operation must be run in a work tree/i
 };
 
 interface GitCommandOptions extends RunOptions {