$ git clone -n https://src.fedoraproject.org/rpms/nss-pem.git /var/lib/mock/f40-build-791133-137122/root/chroot_tmpdir/scmroot/nss-pem
Cloning into '/var/lib/mock/f40-build-791133-137122/root/chroot_tmpdir/scmroot/nss-pem'...
$ git fetch origin d90cce79231bf838751fbd363eedb320ed4987ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nss-pem
 * [new ref]         d90cce79231bf838751fbd363eedb320ed4987ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d90cce7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild