$ git clone -n https://src.fedoraproject.org/rpms/znc-clientbuffer.git /var/lib/mock/f39-build-1596384-38371/root/chroot_tmpdir/scmroot/znc-clientbuffer
Cloning into '/var/lib/mock/f39-build-1596384-38371/root/chroot_tmpdir/scmroot/znc-clientbuffer'...
$ git fetch origin f6ef9fff54a0d1c2b086b0178819f99a7efd8e7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/znc-clientbuffer
 * [new ref]         f6ef9fff54a0d1c2b086b0178819f99a7efd8e7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6ef9ff Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild