$ git clone -n https://src.fedoraproject.org/rpms/R-websocket.git /var/lib/mock/f43-build-side-110352-58909260-6569204/root/chroot_tmpdir/scmroot/R-websocket
Cloning into '/var/lib/mock/f43-build-side-110352-58909260-6569204/root/chroot_tmpdir/scmroot/R-websocket'...
$ git fetch origin 80909756cc09573780bc1c69c74a362a152f25ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-websocket
 * [new ref]         80909756cc09573780bc1c69c74a362a152f25ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8090975 R-maint-sig mass rebuild