$ git clone -n https://src.fedoraproject.org/rpms/ghc-microlens-ghc.git /var/lib/mock/f45-build-10519-418/root/chroot_tmpdir/scmroot/ghc-microlens-ghc
Cloning into '/var/lib/mock/f45-build-10519-418/root/chroot_tmpdir/scmroot/ghc-microlens-ghc'...
$ git fetch origin 3de2cd3a0b27dfa51b86d485d2f1ae6ca685531e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-microlens-ghc
 * [new ref]         3de2cd3a0b27dfa51b86d485d2f1ae6ca685531e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3de2cd3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild