$ git clone -n https://src.fedoraproject.org/rpms/ddnet.git /var/lib/mock/f45-build-39622-750/root/chroot_tmpdir/scmroot/ddnet
Cloning into '/var/lib/mock/f45-build-39622-750/root/chroot_tmpdir/scmroot/ddnet'...
$ git fetch origin 022fdcc9d13262d119e7b2121911776e43e919e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ddnet
 * [new ref]         022fdcc9d13262d119e7b2121911776e43e919e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 022fdcc Exclude empty files