$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Simple-DTDReader.git /var/lib/mock/f45-build-27534-624/root/chroot_tmpdir/scmroot/perl-XML-Simple-DTDReader
Cloning into '/var/lib/mock/f45-build-27534-624/root/chroot_tmpdir/scmroot/perl-XML-Simple-DTDReader'...
$ git fetch origin 87cebc3576550a6be9d503548507930bf712186b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-Simple-DTDReader
 * [new ref]         87cebc3576550a6be9d503548507930bf712186b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87cebc3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild