$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-DH.git /var/lib/mock/f45-build-22611-593/root/chroot_tmpdir/scmroot/perl-Crypt-DH
Cloning into '/var/lib/mock/f45-build-22611-593/root/chroot_tmpdir/scmroot/perl-Crypt-DH'...
$ git fetch origin 036e96fcb0debeb13003f8a5e4855c4d2a036d7a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-DH
 * [new ref]         036e96fcb0debeb13003f8a5e4855c4d2a036d7a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 036e96f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild