$ git clone -n https://src.fedoraproject.org/rpms/binaryen.git /var/lib/mock/f42-build-866967-174574/root/chroot_tmpdir/scmroot/binaryen
Cloning into '/var/lib/mock/f42-build-866967-174574/root/chroot_tmpdir/scmroot/binaryen'...
$ git fetch origin 03c58c930c637bedc72291f7af12e2592ef69d89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/binaryen
 * [new ref]         03c58c930c637bedc72291f7af12e2592ef69d89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03c58c9 use modern dependencies