$ git clone -n https://src.fedoraproject.org/rpms/conmux.git /var/lib/mock/f39-build-1457276-32975/root/chroot_tmpdir/scmroot/conmux
Cloning into '/var/lib/mock/f39-build-1457276-32975/root/chroot_tmpdir/scmroot/conmux'...
$ git fetch origin 5bfac4b84acfcdee0d2a5ff3d6e12beb1c9bdb1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/conmux
 * [new ref]         5bfac4b84acfcdee0d2a5ff3d6e12beb1c9bdb1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bfac4b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild