$ git clone -n https://src.fedoraproject.org/rpms/ghc-vector-builder.git /var/lib/mock/f45-build-10951-425/root/chroot_tmpdir/scmroot/ghc-vector-builder
Cloning into '/var/lib/mock/f45-build-10951-425/root/chroot_tmpdir/scmroot/ghc-vector-builder'...
$ git fetch origin 244ee87d0b22f7bebc1507f2a599a4a11747b219:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-vector-builder
 * [new ref]         244ee87d0b22f7bebc1507f2a599a4a11747b219 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 244ee87 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild