$ git clone -n https://src.fedoraproject.org/rpms/policycoreutils.git /var/lib/mock/f42-build-867476-175511/root/chroot_tmpdir/scmroot/policycoreutils
Cloning into '/var/lib/mock/f42-build-867476-175511/root/chroot_tmpdir/scmroot/policycoreutils'...
$ git fetch origin 4ede7dad3761a6f32b6cf2f99922596dd2dcabda:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/policycoreutils
 * [new ref]         4ede7dad3761a6f32b6cf2f99922596dd2dcabda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ede7da Rebuilt for the bin-sbin merge (2nd attempt)