INFO: mock.py version 1.1.21 starting...
State Changed: init plugins
INFO: tmpfs initialized
INFO: selinux disabled
State Changed: start
INFO: Start(/mnt/dar/packages/gsd/gsd-1.2.0-2.art.src.rpm)  Config(epel-4-i386)
State Changed: lock buildroot
State Changed: clean
INFO: chroot (/var/lib/mock/epel-4-i386) unlocked and deleted
State Changed: unlock buildroot
State Changed: init
State Changed: lock buildroot
Mock Version: 1.1.21
INFO: Mock Version: 1.1.21
INFO: calling preinit hooks
INFO: mounting tmpfs at /var/lib/mock/epel-4-i386/root/.
INFO: enabled root cache
State Changed: unpacking root cache
INFO: enabled yum cache
State Changed: cleaning yum metadata
State Changed: running yum
INFO: unmounting tmpfs.
ERROR: Exception(/mnt/dar/packages/gsd/gsd-1.2.0-2.art.src.rpm) Config(epel-4-i386) 0 minutes 9 seconds
INFO: Results and/or logs in: /var/lib/mock/epel-4-i386/result
ERROR: Command failed: 
 # ['/usr/bin/yum', '--installroot', '/var/lib/mock/epel-4-i386/root/', 'update']
Error: Cannot find a valid baseurl for repo: core
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
 Eg. 4 is not a valid release or hasnt been released yet/
removing mirrorlist with no valid mirrors: /var/lib/mock/epel-4-i386/root/var/cache/yum/core/mirrorlist.txt