$ git clone -n https://src.fedoraproject.org/rpms/ghc-th-expand-syns.git /var/lib/mock/f45-build-10880-425/root/chroot_tmpdir/scmroot/ghc-th-expand-syns
Cloning into '/var/lib/mock/f45-build-10880-425/root/chroot_tmpdir/scmroot/ghc-th-expand-syns'...
$ git fetch origin f09ce8719b141e196e953aee0d090c9fa586962b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-th-expand-syns
 * [new ref]         f09ce8719b141e196e953aee0d090c9fa586962b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f09ce87 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild