$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-Random-Seed.git /var/lib/mock/f45-build-22640-593/root/chroot_tmpdir/scmroot/perl-Crypt-Random-Seed
Cloning into '/var/lib/mock/f45-build-22640-593/root/chroot_tmpdir/scmroot/perl-Crypt-Random-Seed'...
$ git fetch origin dca732e533be81fa776613d0903a06b90236e714:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-Random-Seed
 * [new ref]         dca732e533be81fa776613d0903a06b90236e714 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dca732e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild