$ git clone -n https://src.fedoraproject.org/rpms/pl.git /var/lib/mock/f40-build-2301284-56772/root/chroot_tmpdir/scmroot/pl
Cloning into '/var/lib/mock/f40-build-2301284-56772/root/chroot_tmpdir/scmroot/pl'...
$ git fetch origin 4e2047c0c43dfa1eade8e40d0459a9878c22727f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pl
 * [new ref]         4e2047c0c43dfa1eade8e40d0459a9878c22727f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e2047c Add patch for zlib-ng