$ git clone -n https://src.fedoraproject.org/rpms/ghc-lens.git /var/lib/mock/f45-build-10461-418/root/chroot_tmpdir/scmroot/ghc-lens
Cloning into '/var/lib/mock/f45-build-10461-418/root/chroot_tmpdir/scmroot/ghc-lens'...
$ git fetch origin f8d7d62f75c1fc7af90be313d98749756e96b811:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lens
 * [new ref]         f8d7d62f75c1fc7af90be313d98749756e96b811 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8d7d62 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild