$ git clone -n https://src.fedoraproject.org/rpms/ditaa.git /var/lib/mock/f41-build-1072452-19725/root/chroot_tmpdir/scmroot/ditaa
Cloning into '/var/lib/mock/f41-build-1072452-19725/root/chroot_tmpdir/scmroot/ditaa'...
$ git fetch origin b6579fd54c4371f15a7fc0bbe7f99064c00df2dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ditaa
 * [new ref]         b6579fd54c4371f15a7fc0bbe7f99064c00df2dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6579fd Eliminate use of obsolete %patchN syntax (#2283636)