$ git clone -n https://src.fedoraproject.org/rpms/emacs-common-proofgeneral.git /var/lib/mock/f39-build-1495774-34545/root/chroot_tmpdir/scmroot/emacs-common-proofgeneral
Cloning into '/var/lib/mock/f39-build-1495774-34545/root/chroot_tmpdir/scmroot/emacs-common-proofgeneral'...
$ git fetch origin 2c800fbb71a196822d312b0a4ff37de1704edf34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-common-proofgeneral
 * [new ref]         2c800fbb71a196822d312b0a4ff37de1704edf34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c800fb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild