$ git clone -n https://src.fedoraproject.org/rpms/yosys.git /var/lib/mock/f41-build-side-1-3135098-39766/root/chroot_tmpdir/scmroot/yosys
Cloning into '/var/lib/mock/f41-build-side-1-3135098-39766/root/chroot_tmpdir/scmroot/yosys'...
$ git fetch origin c652c4b43c512c69003675c0a0f85d68b9353d5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yosys
 * [new ref]         c652c4b43c512c69003675c0a0f85d68b9353d5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c652c4b update to 0.47 snapshot