$ git clone -n https://src.fedoraproject.org/rpms/ghc-config-schema.git /var/lib/mock/f45-build-10124-413/root/chroot_tmpdir/scmroot/ghc-config-schema
Cloning into '/var/lib/mock/f45-build-10124-413/root/chroot_tmpdir/scmroot/ghc-config-schema'...
$ git fetch origin 3277156420c3e8034a1456c117f700496ab9c59f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-config-schema
 * [new ref]         3277156420c3e8034a1456c117f700496ab9c59f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3277156 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild