$ git clone -n https://src.fedoraproject.org/rpms/wavbreaker.git /var/lib/mock/f40-build-766841-124356/root/chroot_tmpdir/scmroot/wavbreaker
Cloning into '/var/lib/mock/f40-build-766841-124356/root/chroot_tmpdir/scmroot/wavbreaker'...
$ git fetch origin c17cbd90139a1f8f316622496d5100dac9a4b169:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wavbreaker
 * [new ref]         c17cbd90139a1f8f316622496d5100dac9a4b169 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c17cbd9 Update to 0.16