Description of problem:
I am not able to initialize epel-{6,7}-x86_64 mock profiles installed by mock on a fresh installation of Fedora 22 Beta.


Version-Release number of selected component (if applicable):
mock-1.2.7-1.fc22.noarch


How reproducible:
easily


Steps to Reproduce:
1. mock --init --root epel-6-x86_64
2. mock --init --root epel-7-x86_64


Actual results:
[kdudka@f22 ~]$ mock --init --root epel-6-x86_64
INFO: mock.py version 1.2.7 starting (python version = 3.4.2)...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled root cache
INFO: enabled yum cache
Start: cleaning yum metadata
Finish: cleaning yum metadata
INFO: enabled ccache
Mock Version: 1.2.7
INFO: Mock Version: 1.2.7
Start: yum install
ERROR: Command failed. See logs for output.
 # /usr/bin/yum --installroot /var/lib/mock/epel-6-x86_64/root/ --releasever 6 install @buildsys-build --setopt=tsflags=nocontexts
Yum command has been deprecated, use dnf instead.
See 'man dnf' and 'man yum2dnf' for more information.
To transfer transaction metadata from yum to DNF, run 'dnf migrate'Redirecting to '/usr/bin/dnf --installroot /var/lib/mock/epel-6-x86_64/root/ --releasever 6 install @buildsys-build --setopt=tsflags=nocontexts'

Error: Failed to synchronize cache for repo 'fedora' from 'https://mirrors.fedoraproject.org/metalink?repo=fedora-6&arch=x86_64': Cannot prepare internal mirrorlist: file "repomd.xml" was not found in metalink


[kdudka@f22 ~]$ mock --init --root epel-7-x86_64
INFO: mock.py version 1.2.7 starting (python version = 3.4.2)...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled root cache
INFO: enabled yum cache
Start: cleaning yum metadata
Finish: cleaning yum metadata
INFO: enabled ccache
Mock Version: 1.2.7
INFO: Mock Version: 1.2.7
Start: yum install
Yum command has been deprecated, use dnf instead.
See 'man dnf' and 'man yum2dnf' for more information.
To transfer transaction metadata from yum to DNF, run 'dnf migrate'Redirecting to '/usr/bin/dnf --installroot /var/lib/mock/epel-7-x86_64/root/ --releasever 7 install @buildsys-build --setopt=tsflags=nocontexts'

Fedora 7 - x86_64                                17 MB/s |  11 MB     00:00    
Fedora 7 - x86_64 - Test Updates                6.9 MB/s | 375 kB     00:00    
Fedora 7 - x86_64 - Updates                      17 MB/s | 9.3 MB     00:00    
Using metadata from Tue Apr 28 18:23:04 2015 (0:00:08 hours old)ERROR: Command failed. See logs for output.
 # /usr/bin/yum --installroot /var/lib/mock/epel-7-x86_64/root/ --releasever 7 install @buildsys-build --setopt=tsflags=nocontexts

Warning: Group 'buildsys-build' does not exist.
Error: Nothing to do.