$ git clone -n https://src.fedoraproject.org/rpms/perl-Email-Address.git /var/lib/mock/f45-build-23288-596/root/chroot_tmpdir/scmroot/perl-Email-Address
Cloning into '/var/lib/mock/f45-build-23288-596/root/chroot_tmpdir/scmroot/perl-Email-Address'...
$ git fetch origin c28bfdefd3bcfc3621f64a06dc6de77cc176f8a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Email-Address
 * [new ref]         c28bfdefd3bcfc3621f64a06dc6de77cc176f8a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c28bfde Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild