$ git clone -n https://src.fedoraproject.org/rpms/gvisor-tap-vsock.git /var/lib/mock/f41-build-847385-163983/root/chroot_tmpdir/scmroot/gvisor-tap-vsock
Cloning into '/var/lib/mock/f41-build-847385-163983/root/chroot_tmpdir/scmroot/gvisor-tap-vsock'...
$ git fetch origin 7d03494fb0bba0d96e8a8a6e141380a46154850a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gvisor-tap-vsock
 * [new ref]         7d03494fb0bba0d96e8a8a6e141380a46154850a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d03494 Update to 0.7.5 upstream release