$ git clone -n https://src.fedoraproject.org/rpms/perl-Business-ISSN.git /var/lib/mock/f45-build-21898-588/root/chroot_tmpdir/scmroot/perl-Business-ISSN
Cloning into '/var/lib/mock/f45-build-21898-588/root/chroot_tmpdir/scmroot/perl-Business-ISSN'...
$ git fetch origin 50a9908735149ae299067655d8dc1ac97259b182:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Business-ISSN
 * [new ref]         50a9908735149ae299067655d8dc1ac97259b182 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50a9908 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild