$ git clone -n https://src.fedoraproject.org/rpms/python-unix-ar.git /var/lib/mock/f42-build-side-1-3502145-45977/root/chroot_tmpdir/scmroot/python-unix-ar
Cloning into '/var/lib/mock/f42-build-side-1-3502145-45977/root/chroot_tmpdir/scmroot/python-unix-ar'...
$ git fetch origin ce0fe313ac79d45f2463441d69b2fb787b03c2ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-unix-ar
 * [new ref]         ce0fe313ac79d45f2463441d69b2fb787b03c2ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce0fe31 Don't needlessly try to generate test requirements by tox