extensions/git/src/repository.ts/Repository/provideOriginalResource
class Repository:	provideOriginalResource(uri: Uri): Uri | undefined {
		if (uri.scheme !== 'file') {
			return;
		}

		const path = uri.path;

		if (this.mergeGroup.resourceStates.some(r => r.resourceUri.path === path)) {
			return undefined;
		}

		return toGitUri(uri, '', { replaceFileExtension: true });
	}