$ git clone -n https://src.fedoraproject.org/rpms/ghdl.git /var/lib/mock/f40-build-792080-138073/root/chroot_tmpdir/scmroot/ghdl
Cloning into '/var/lib/mock/f40-build-792080-138073/root/chroot_tmpdir/scmroot/ghdl'...
$ git fetch origin 22a8fd585add2424db617314dd3239d3dc6608a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghdl
 * [new ref]         22a8fd585add2424db617314dd3239d3dc6608a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22a8fd5 bump spec