$ git clone -n https://src.fedoraproject.org/rpms/gvisor-tap-vsock.git /var/lib/mock/f41-build-836905-158942/root/chroot_tmpdir/scmroot/gvisor-tap-vsock
Cloning into '/var/lib/mock/f41-build-836905-158942/root/chroot_tmpdir/scmroot/gvisor-tap-vsock'...
$ git fetch origin 237271591d3289dc548ea2caebe3c96f2e04f8e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gvisor-tap-vsock
 * [new ref]         237271591d3289dc548ea2caebe3c96f2e04f8e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2372715 Update to 0.7.4 upstream release