% no bookmarks
no bookmarks set
% set bookmark X
% update to bookmark X
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% list bookmarks
 * X                         -1:000000000000
% rename
% list bookmarks
 * Z                         -1:000000000000
% new bookmark Y
% list bookmarks
   Y                         -1:000000000000
 * Z                         -1:000000000000
% commit
% list bookmarks
   Y                         -1:000000000000
 * Z                         0:719295282060