When you've committed something, but then rebased or reset the branch position so the commit is not longer in the history of any branch or tag. This usually isn't a problem, because when you rebase work you are making a copy of the commit so references to the data should be the same.
I also think it's worth noting, `git gc`, which is triggered automatically occasionally, actually runs `git prune`.
m0tive|11 years ago
I also think it's worth noting, `git gc`, which is triggered automatically occasionally, actually runs `git prune`.