git branches?

[Juha]

Hi !

Does anybody know if it is possible to do branches with git? How?
I tried, but failed:

$ git push origin origin:refs/heads/orage-4.8

Total 0 (delta 0), reused 0 (delta 0)
remote: >> ensure history integrity
remote: Email invalid; please set user.email in your git config.
remote: Failed at rev 6ab067c623eb31fbc4101b65e7ace4cf4044f028
remote: error: hook declined to update refs/heads/orage-4.8
To ssh://git.xfce.org/git/apps/orage
  ! [remote rejected] origin/HEAD -> orage-4.8 (hook declined)
error: failed to push some refs to 'ssh://git.xfce.org/git/apps/orage'

$ git config --list
user.name=Juha Kautto
user.email=juha at xfce.org
push.default=current
core.repositoryformatversion=0
core.filemode=true
core.bare=false
core.logallrefupdates=true
remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
remote.origin.url=ssh://git.xfce.org/git/apps/orage
branch.master.remote=origin
branch.master.merge=refs/heads/master
$ git branch -r
   origin/BMEURER
   origin/HEAD -> origin/master
   origin/KORBINUS
   origin/master
   origin/orage-4.5
   origin/xfce-4.0
   origin/xfce-4.2
   origin/xfce-4.4
   origin/xfce-4.6