$ git clone -n https://src.fedoraproject.org/rpms/ghc-microlens.git /var/lib/mock/f45-build-10518-418/root/chroot_tmpdir/scmroot/ghc-microlens
Cloning into '/var/lib/mock/f45-build-10518-418/root/chroot_tmpdir/scmroot/ghc-microlens'...
$ git fetch origin 2fea3b4d07f4c4a889fa6033cc55a139a7c73835:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-microlens
 * [new ref]         2fea3b4d07f4c4a889fa6033cc55a139a7c73835 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fea3b4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild