$ git clone -n https://src.fedoraproject.org/rpms/ghc-transformers-base.git /var/lib/mock/f45-build-10900-425/root/chroot_tmpdir/scmroot/ghc-transformers-base
Cloning into '/var/lib/mock/f45-build-10900-425/root/chroot_tmpdir/scmroot/ghc-transformers-base'...
$ git fetch origin 80149b700cdd60e8d0ad35b88a0abe3c39cad9e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-transformers-base
 * [new ref]         80149b700cdd60e8d0ad35b88a0abe3c39cad9e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80149b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild