$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Twig.git /var/lib/mock/f45-build-27586-625/root/chroot_tmpdir/scmroot/perl-XML-Twig
Cloning into '/var/lib/mock/f45-build-27586-625/root/chroot_tmpdir/scmroot/perl-XML-Twig'...
$ git fetch origin c57c8803de14ed13a656f50b057e5c0814f63a71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-Twig
 * [new ref]         c57c8803de14ed13a656f50b057e5c0814f63a71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c57c880 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild