$ git clone -n https://src.fedoraproject.org/rpms/nss.git /var/lib/mock/f40-build-785702-134063/root/chroot_tmpdir/scmroot/nss
Cloning into '/var/lib/mock/f40-build-785702-134063/root/chroot_tmpdir/scmroot/nss'...
$ git fetch origin 9179093aa65682d2125ecd46217d398259690f4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nss
 * [new ref]         9179093aa65682d2125ecd46217d398259690f4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9179093 Update NSS to 3.98.0