4 ms·

I love how this got 4 different answers.

• pxmpxm 4y ago
  The question was intentionally crafted for that effect :)
• peteradio 4y ago
  2 answers the same and rolling back all files. 1 answer for rolling back single file. 1 non-solution. The OP has a poorly defined use case for "undo" (which commit? all files or one?) and can easily wrap whichever suits their need in an alias.