$ git clone -n https://src.fedoraproject.org/rpms/ghc-text-metrics.git /var/lib/mock/f45-build-10838-424/root/chroot_tmpdir/scmroot/ghc-text-metrics
Cloning into '/var/lib/mock/f45-build-10838-424/root/chroot_tmpdir/scmroot/ghc-text-metrics'...
$ git fetch origin b2e5159879a9aedc67284f7af8bf14f739fdeb1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-text-metrics
 * [new ref]         b2e5159879a9aedc67284f7af8bf14f739fdeb1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2e5159 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild