$ git clone -n https://src.fedoraproject.org/rpms/nss.git /var/lib/mock/f33-build-180599-45180/root/chroot_tmpdir/scmroot/nss
Cloning into '/var/lib/mock/f33-build-180599-45180/root/chroot_tmpdir/scmroot/nss'...
$ git reset --hard 2b122e4485e055f53609ee75829bba57bf0a6821
HEAD is now at 2b122e4 Update to NSS 3.51