$ git clone -n https://src.fedoraproject.org/rpms/tmux-top.git /var/lib/mock/f41-build-side-1-2670842-29064/root/chroot_tmpdir/scmroot/tmux-top
Cloning into '/var/lib/mock/f41-build-side-1-2670842-29064/root/chroot_tmpdir/scmroot/tmux-top'...
$ git fetch origin 81959a30db26fa682049c2c3cc50de54d7e0d93b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tmux-top
 * [new ref]         81959a30db26fa682049c2c3cc50de54d7e0d93b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81959a3 convert GPLv2+ license to SPDX