$ git clone -n https://src.fedoraproject.org/rpms/R-sodium.git /var/lib/mock/f40-build-1514427-23911/root/chroot_tmpdir/scmroot/R-sodium
Cloning into '/var/lib/mock/f40-build-1514427-23911/root/chroot_tmpdir/scmroot/R-sodium'...
$ git fetch origin 54b7039729205b5dea64027906e141184e28541f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-sodium
 * [new ref]         54b7039729205b5dea64027906e141184e28541f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54b7039 R-maint-sig mass rebuild