Make MSYS2 git compatible (not only Git for Windows)

extensions/git/src/git.ts

@@ -529,6 +529,13 @@ export class Git {
 
 				return path.normalize(pathUri.fsPath);
 			}
+
+			// MSYS2 Git (not Git for Windows) rev-parse returns Cygwin style path. (Git for Windows returns Windows style path with rev-parse)
+			// Convert Cygwin style path -> Windows style path
+			const cygpathRegex = /^\\([a-z])\\/;
+			if (cygpathRegex.test(repositoryRootPath)) {
+				return repositoryRootPath.replace(cygpathRegex, '$1:\\');
+			}
 		}
 
 		return repositoryRootPath;