$ git clone -n https://src.fedoraproject.org/rpms/R-websocket.git /var/lib/mock/f41-build-side-1-2645797-27204/root/chroot_tmpdir/scmroot/R-websocket
Cloning into '/var/lib/mock/f41-build-side-1-2645797-27204/root/chroot_tmpdir/scmroot/R-websocket'...
$ git fetch origin c87e79839c38debaf5f30c90dc589ee0eaa5f543:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-websocket
 * [new ref]         c87e79839c38debaf5f30c90dc589ee0eaa5f543 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c87e798 convert GPLv2 license to SPDX