$ git clone -n https://src.fedoraproject.org/rpms/mod_nss.git /var/lib/mock/f39-build-1596607-38386/root/chroot_tmpdir/scmroot/mod_nss
Cloning into '/var/lib/mock/f39-build-1596607-38386/root/chroot_tmpdir/scmroot/mod_nss'...
$ git fetch origin 5b2f2503f0ebf8867c48df007b47a4b0647cd894:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mod_nss
 * [new ref]         5b2f2503f0ebf8867c48df007b47a4b0647cd894 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b2f250 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild