$ git clone -n https://src.fedoraproject.org/rpms/nss.git /var/lib/mock/f39-build-1776196-41523/root/chroot_tmpdir/scmroot/nss
Cloning into '/var/lib/mock/f39-build-1776196-41523/root/chroot_tmpdir/scmroot/nss'...
$ git fetch origin 8e7a0b3ff97582234c80097fba62e4c652242008:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nss
 * [new ref]         8e7a0b3ff97582234c80097fba62e4c652242008 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e7a0b3 Fix compatibility issue in upstream patch to use HACL ECC 256