Description of problem:

Build fails during importing when building rpm using Mock SCM from different git branch than master.




full error import log:

2. Task: 172185-epel7, importing the package: None
Build via Mock
/usr/bin/mock -r epel-7-x86_64 --scm-enable --scm-option method=git --scm-option package=openshift2nulecule --scm-option branch=prepare-v0.1.0 --scm-option write_tar=True --scm-option spec=openshift2nulecule.spec --scm-option git_get='git clone --depth 1 https://github.com/kadel/openshift2nulecule openshift2nulecule' --buildsrpm --resultdir=/tmp/tmpEqzRfr
Exception raised during srpm import:
Traceback (most recent call last):
  File "/usr/share/copr/dist_git/dist_git_importer.py", line 489, in do_import
    SourceProvider(task, fetched_srpm_path).get_srpm()
  File "/usr/share/copr/dist_git/dist_git_importer.py", line 159, in get_srpm
    self.provider(self.task, self.target_path).get_srpm()
  File "/usr/share/copr/dist_git/dist_git_importer.py", line 310, in get_srpm
    raise SrpmBuilderException(error)
SrpmBuilderException: INFO: mock.py version 1.2.17 starting (python version = 2.7.5)...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
ERROR: Command failed. See logs for output.
 # git checkout prepare-v0.1.0
WARNING: unable to delete selinux filesystems (/tmp/mock-selinux-plugin.NCbxrH): [Errno 1] Operation not permitted: '/tmp/mock-selinux-plugin.NCbxrH'

Sending back: 
{"task_id": "172185-epel7", "error": "srpm_build_error"}