$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-blaze-textual.git /var/lib/mock/f39-build-2225391-52824/root/chroot_tmpdir/scmroot/ghc-blaze-textual
Cloning into '/var/lib/mock/f39-build-2225391-52824/root/chroot_tmpdir/scmroot/ghc-blaze-textual'...
$ git fetch origin 747b98dda918a5eba52f864e82e277aa78ecae7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-blaze-textual
 * [new ref]         747b98dda918a5eba52f864e82e277aa78ecae7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 747b98d rv64 rebuild