[PATCH/RFC 0/3] teach fetch --prune

This is just a start so I can get some feedback. Some things still missing:

1) "git remote prune <remote>" calls warn_dangling_symref(), but 
"git fetch --prune" does not. I ran out of time tonight to refactor 
warn_dangling_symref() to do something more intelligent than just spew to
stdout (which doesn't get along with fetch, which spews to stderr...).

2) Perhaps "git remote update --prune" should be refactored to call 
"git fetch --prune". If so, then fetch should gain a "--prune-only" option
so that "git remote prune" can just call "got fetch --prune-only".

3) Perhaps add a config option for users who wish to prune by default.

Thoughts, comments, flames?

Jay Soffian (3):
  remote: refactor some logic into get_stale_heads()
  builtin-fetch: add --dry-run option
  builtin-fetch: add --prune option

 builtin-fetch.c  |   30 +++++++++++++++++++++++++++---
 builtin-remote.c |   32 ++++++++------------------------
 remote.c         |   40 ++++++++++++++++++++++++++++++++++++++++
 remote.h         |    3 +++
 4 files changed, 78 insertions(+), 27 deletions(-)