$ git clone -n https://src.fedoraproject.org/rpms/dia-gnomeDIAicons.git /var/lib/mock/f41-build-1072439-19725/root/chroot_tmpdir/scmroot/dia-gnomeDIAicons
Cloning into '/var/lib/mock/f41-build-1072439-19725/root/chroot_tmpdir/scmroot/dia-gnomeDIAicons'...
$ git fetch origin 274c4ace5c218a02a49540cd421bc12828ae01d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dia-gnomeDIAicons
 * [new ref]         274c4ace5c218a02a49540cd421bc12828ae01d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 274c4ac Use upstream tarball archive name