$ git clone -n https://src.fedoraproject.org/rpms/ghc-aeson.git /var/lib/mock/f45-build-9966-412/root/chroot_tmpdir/scmroot/ghc-aeson
Cloning into '/var/lib/mock/f45-build-9966-412/root/chroot_tmpdir/scmroot/ghc-aeson'...
$ git fetch origin f10ab1d27d64f9c4a40b868e1d43d108dd38185a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-aeson
 * [new ref]         f10ab1d27d64f9c4a40b868e1d43d108dd38185a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f10ab1d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild