Repository Compare is not really Compare

It took me quite some time to figure out what the Repository Compare tool on is doing.
What its shows is actually “If I merged the source branch into the target branch, what would the diff on the target branch be?”. While that could be useful in some cases, I would find it more useful to be able to compare two commits. It should be possible to specify these in several ways, e.g.

  • Commit hash
  • Tag
  • HEAD of a branch

This would allow me to answer more questions like

  • What was changed between tag A and tag B?
  • What is the difference between branch X and branch Y?
  • What was changed on branch Z?