$ git clone -n https://src.fedoraproject.org/rpms/sawfish.git /var/lib/mock/f40-build-804803-144615/root/chroot_tmpdir/scmroot/sawfish
Cloning into '/var/lib/mock/f40-build-804803-144615/root/chroot_tmpdir/scmroot/sawfish'...
$ git fetch origin 4aa70d0a79d70a0a0029d9c230c79a150f0509df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sawfish
 * [new ref]         4aa70d0a79d70a0a0029d9c230c79a150f0509df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4aa70d0 Drop KDE4, fixes rhbz#2261678