$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Tidy.git /var/lib/mock/f45-build-27613-625/root/chroot_tmpdir/scmroot/perl-XML-Tidy
Cloning into '/var/lib/mock/f45-build-27613-625/root/chroot_tmpdir/scmroot/perl-XML-Tidy'...
$ git fetch origin dd96e8ca171df52fc79e53b5819fff64e4ea3a80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-Tidy
 * [new ref]         dd96e8ca171df52fc79e53b5819fff64e4ea3a80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd96e8c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild