$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Validator-Schema.git /var/lib/mock/f45-build-27614-625/root/chroot_tmpdir/scmroot/perl-XML-Validator-Schema
Cloning into '/var/lib/mock/f45-build-27614-625/root/chroot_tmpdir/scmroot/perl-XML-Validator-Schema'...
$ git fetch origin 20f863be6975baf8bd24c1b65c293d82d97135d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-Validator-Schema
 * [new ref]         20f863be6975baf8bd24c1b65c293d82d97135d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20f863b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild