$ git clone -n http://git.inferitos.ru/rpms/firefox.git /var/lib/mock/inferit-10_0-extras-build-91433-168205/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/inferit-10_0-extras-build-91433-168205/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin 64af71a:KOJI_FETCH_HEAD
fatal: couldn't find remote ref 64af71a
$ git reset --hard 64af71a
HEAD is now at 64af71a Set -j2