extensions/git/src/repository.ts/Repository/updateInputBoxPlaceholder
class Repository:	private updateInputBoxPlaceholder(): void {
		const branchName = this.headShortName;

		if (branchName) {
			// '{0}' will be replaced by the corresponding key-command later in the process, which is why it needs to stay.
			this._sourceControl.inputBox.placeholder = localize('commitMessageWithHeadLabel', "Message ({0} to commit on '{1}')", '{0}', branchName);
		} else {
			this._sourceControl.inputBox.placeholder = localize('commitMessage', "Message ({0} to commit)");
		}
	}