$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-gio.git /var/lib/mock/f39-build-2228882-53110/root/chroot_tmpdir/scmroot/ghc-gio
Cloning into '/var/lib/mock/f39-build-2228882-53110/root/chroot_tmpdir/scmroot/ghc-gio'...
$ git fetch origin a06b47f3c420365b84bac9006cf20db1b4d61c57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-gio
 * [new ref]         a06b47f3c420365b84bac9006cf20db1b4d61c57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a06b47f rv64 rebuild