$ git clone -n https://src.fedoraproject.org/rpms/ghc-asn1-encoding.git /var/lib/mock/f40-build-743565-111265/root/chroot_tmpdir/scmroot/ghc-asn1-encoding
Cloning into '/var/lib/mock/f40-build-743565-111265/root/chroot_tmpdir/scmroot/ghc-asn1-encoding'...
$ git fetch origin 03bff771ec14141ab6482b22febfd7470285602c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-asn1-encoding
 * [new ref]         03bff771ec14141ab6482b22febfd7470285602c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03bff77 bump release