extensions/git/src/autofetch.ts/AutoFetcher/onConfiguration
class AutoFetcher:	private onConfiguration(e?: ConfigurationChangeEvent): void {
		if (e !== undefined && !e.affectsConfiguration('git.autofetch')) {
			return;
		}

		const gitConfig = workspace.getConfiguration('git', Uri.file(this.repository.root));
		switch (gitConfig.get<boolean | 'all'>('autofetch')) {
			case true:
				this._fetchAll = false;
				this.enable();
				break;
			case 'all':
				this._fetchAll = true;
				this.enable();
				break;
			case false:
			default:
				this._fetchAll = false;
				this.disable();
				break;
		}
	}