$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-DSA.git /var/lib/mock/f45-build-22600-593/root/chroot_tmpdir/scmroot/perl-Crypt-DSA
Cloning into '/var/lib/mock/f45-build-22600-593/root/chroot_tmpdir/scmroot/perl-Crypt-DSA'...
$ git fetch origin 45cd73b9d518a06fc1220bc005ea6676c08ce120:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-DSA
 * [new ref]         45cd73b9d518a06fc1220bc005ea6676c08ce120 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45cd73b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild