$ git clone -n https://src.fedoraproject.org/rpms/ghc-random.git /var/lib/mock/f45-build-10654-419/root/chroot_tmpdir/scmroot/ghc-random
Cloning into '/var/lib/mock/f45-build-10654-419/root/chroot_tmpdir/scmroot/ghc-random'...
$ git fetch origin 5c049b2d16d0f6608e9b22f78882e620d184610d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-random
 * [new ref]         5c049b2d16d0f6608e9b22f78882e620d184610d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c049b2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild