$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-DES.git /var/lib/mock/f45-build-22559-593/root/chroot_tmpdir/scmroot/perl-Crypt-DES
Cloning into '/var/lib/mock/f45-build-22559-593/root/chroot_tmpdir/scmroot/perl-Crypt-DES'...
$ git fetch origin 4312bbd1fdd0d42bf496f864ec992d5f5839dd7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-DES
 * [new ref]         4312bbd1fdd0d42bf496f864ec992d5f5839dd7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4312bbd Update to 2.09 (rhbz#2513719)