$ git clone -n https://src.fedoraproject.org/rpms/pngquant.git /var/lib/mock/f40-build-798133-141758/root/chroot_tmpdir/scmroot/pngquant
Cloning into '/var/lib/mock/f40-build-798133-141758/root/chroot_tmpdir/scmroot/pngquant'...
$ git fetch origin b6fda40e074aa2de26eb1b6c35034644e6d65d87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pngquant
 * [new ref]         b6fda40e074aa2de26eb1b6c35034644e6d65d87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6fda40 Neuter test failures on s390x