$ git clone -n https://src.fedoraproject.org/rpms/balsa.git /var/lib/mock/f39-build-1625139-39136/root/chroot_tmpdir/scmroot/balsa
Cloning into '/var/lib/mock/f39-build-1625139-39136/root/chroot_tmpdir/scmroot/balsa'...
$ git fetch origin 4ce9ce1151456c845f97a72c1fd234f6b56a5859:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/balsa
 * [new ref]         4ce9ce1151456c845f97a72c1fd234f6b56a5859 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ce9ce1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild