$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-x509-validation.git /var/lib/mock/f39-build-2208469-52135/root/chroot_tmpdir/scmroot/ghc-x509-validation
Cloning into '/var/lib/mock/f39-build-2208469-52135/root/chroot_tmpdir/scmroot/ghc-x509-validation'...
$ git fetch origin cd2e839db620801089a3aded3646eb4f3d6dc617:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-x509-validation
 * [new ref]         cd2e839db620801089a3aded3646eb4f3d6dc617 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd2e839 rv64 rebuild