$ git clone -n https://src.fedoraproject.org/rpms/R-websocket.git /var/lib/mock/f41-build-855688-167303/root/chroot_tmpdir/scmroot/R-websocket
Cloning into '/var/lib/mock/f41-build-855688-167303/root/chroot_tmpdir/scmroot/R-websocket'...
$ git fetch origin 9d8ab17604e032d615fe359d6c2c3153b0cc99c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-websocket
 * [new ref]         9d8ab17604e032d615fe359d6c2c3153b0cc99c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d8ab17 Update to latest version (#2299418)