$ git clone -n https://src.fedoraproject.org/rpms/python-nss.git /var/lib/mock/f39-build-1581942-38099/root/chroot_tmpdir/scmroot/python-nss
Cloning into '/var/lib/mock/f39-build-1581942-38099/root/chroot_tmpdir/scmroot/python-nss'...
$ git fetch origin 034da2f05a07806d051e0bb0a37b3cd9f28267b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nss
 * [new ref]         034da2f05a07806d051e0bb0a37b3cd9f28267b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 034da2f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild