$ git clone -n https://src.fedoraproject.org/rpms/python-nss.git /var/lib/mock/f40-build-783739-133100/root/chroot_tmpdir/scmroot/python-nss
Cloning into '/var/lib/mock/f40-build-783739-133100/root/chroot_tmpdir/scmroot/python-nss'...
$ git fetch origin b24e0e4c095a17544d0b77be6cffa9ae6ceb87eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nss
 * [new ref]         b24e0e4c095a17544d0b77be6cffa9ae6ceb87eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b24e0e4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild