$ git clone -n https://src.fedoraproject.org/rpms/perl-HTML-WikiConverter.git /var/lib/mock/f45-build-23964-601/root/chroot_tmpdir/scmroot/perl-HTML-WikiConverter
Cloning into '/var/lib/mock/f45-build-23964-601/root/chroot_tmpdir/scmroot/perl-HTML-WikiConverter'...
$ git fetch origin d87956643ea70a479434e5f1043b9130678cade6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTML-WikiConverter
 * [new ref]         d87956643ea70a479434e5f1043b9130678cade6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d879566 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild