$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Dumper.git /var/lib/mock/f45-build-27471-624/root/chroot_tmpdir/scmroot/perl-XML-Dumper
Cloning into '/var/lib/mock/f45-build-27471-624/root/chroot_tmpdir/scmroot/perl-XML-Dumper'...
$ git fetch origin 9ef4622da6f2e66e781723b7e6eeb1d5344585fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-Dumper
 * [new ref]         9ef4622da6f2e66e781723b7e6eeb1d5344585fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ef4622 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild