$ git clone -n https://src.fedoraproject.org/rpms/yosys.git /var/lib/mock/f42-build-side-1-3584669-46895/root/chroot_tmpdir/scmroot/yosys
Cloning into '/var/lib/mock/f42-build-side-1-3584669-46895/root/chroot_tmpdir/scmroot/yosys'...
$ git fetch origin e0304e16746bde38d0b37e7a73d6e393c8068563:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yosys
 * [new ref]         e0304e16746bde38d0b37e7a73d6e393c8068563 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0304e1 update to 0.54 snapshot