$ git clone -n https://src.fedoraproject.org/rpms/yosys.git /var/lib/mock/f41-build-852611-166424/root/chroot_tmpdir/scmroot/yosys
Cloning into '/var/lib/mock/f41-build-852611-166424/root/chroot_tmpdir/scmroot/yosys'...
$ git fetch origin c84d9b35f744bf1085286c14cf13bab03831ae20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yosys
 * [new ref]         c84d9b35f744bf1085286c14cf13bab03831ae20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c84d9b3 update to 0.45 snapshot