INFO: mock.py version 1.1.38 starting...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
Start: lock buildroot
Start: clean chroot
Finish: clean chroot
Finish: lock buildroot
Start: chroot init
Start: lock buildroot
Mock Version: 1.1.38
INFO: Mock Version: 1.1.38
INFO: calling preinit hooks
Start: device setup
Finish: device setup
Start: yum update
ERROR: Command failed: 
 # ['/usr/bin/yum', '--installroot', '/srv/build/7/B/mock-root/rhel-7b1-x86_64/root/', 'install', 'bash', 'bzip2', 'coreutils', 'cpio', 'diffutils', 'system-release', 'findutils', 'gawk', 'gcc', 'gcc-c++', 'grep', 'gzip', 'info', 'make', 'patch', 'redhat-rpm-config', 'rpm-build', 'sed', 'shadow-utils', 'tar', 'unzip', 'util-linux', 'which', 'xz', '--setopt=tsflags=nocontexts']
http://repohost/tmp/mirror/r7b1/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

INFO: mock.py version 1.1.38 starting...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
Mock Version: 1.1.38
INFO: Mock Version: 1.1.38
Start: lock buildroot
INFO: installing package(s): glibc-devel.i686 nss-softokn-freebl.i686
ERROR: Command failed: 
 # ['/usr/bin/yum', '--installroot', '/srv/build/7/B/mock-root/rhel-7b1-x86_64/root/', 'install', 'glibc-devel.i686', 'nss-softokn-freebl.i686', '--setopt=tsflags=nocontexts']
http://repohost/tmp/mirror/r7b1/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

INFO: mock.py version 1.1.38 starting...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
INFO: Start(memtest86+-4.20-14.el7.src.rpm)  Config(rhel-7b1-x86_64)
Start: chroot init
Start: lock buildroot
Mock Version: 1.1.38
INFO: Mock Version: 1.1.38
INFO: calling preinit hooks
Start: device setup
Finish: device setup
Start: yum update
Finish: yum update
ERROR: Exception(memtest86+-4.20-14.el7.src.rpm) Config(rhel-7b1-x86_64) 0 minutes 0 seconds
INFO: Results and/or logs in: logs/c7-updates/memtest86+/20140911115213/4.20-14.el7.x86_64
INFO: Cleaning up build root ('clean_on_failure=True')
Start: lock buildroot
Start: clean chroot
INFO: chroot (/srv/build/7/B/mock-root/rhel-7b1-x86_64) unlocked and deleted
Finish: clean chroot
Finish: lock buildroot
ERROR: Could not find useradd in chroot, maybe the install failed?