title: git log: only show yesterday's commit
body: <p><code>git log --since=yesterday --until=today</code> doesn't work because it will <em>include</em> today's commits.</p>
  
  <p><code>git log --since=yesterday --until=yesterday</code> doesn't work because it will not show anything at all.</p>
  
  <p>I'm assuming that "yesterday" translates to 12:01am of the previous date, and "today" translates to the current hour. That can make sense to some degree, but it is very unhelpful for me right now.</p>
  
  <p>I also want this to be in a script. So I can't hardcode the dates/times. Is the only option really to programmatically calculate yesterday's date and manually pass the hour as well?</p>
  
  <p>EDIT:</p>
  
  <p>I noticed the following. In the source code for the most recent version of git, it appears that "yesterday" <a href="https://github.com/git/git/blob/965798d1f2992a4bdadb81eba195a7d465b6454a/date.c#L923" rel="noreferrer">(see code here)</a> means 24*60*60 seconds before the current time. So depending on how precise you need to be, that could matter. Right above that line in the code you see that "today" does mean right now</p>