$ git clone -n https://src.fedoraproject.org/rpms/xawtv.git /var/lib/mock/f42-build-878878-181577/root/chroot_tmpdir/scmroot/xawtv
Cloning into '/var/lib/mock/f42-build-878878-181577/root/chroot_tmpdir/scmroot/xawtv'...
$ git fetch origin 5f0ef07e614a68d0343dad54735807c9fb5eb9a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xawtv
 * [new ref]         5f0ef07e614a68d0343dad54735807c9fb5eb9a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f0ef07 Switch to PolicyKit, and no more use /usr/sbin