$ git clone -n https://src.fedoraproject.org/rpms/replacer.git /var/lib/mock/f38-build-side-42-init-devel-696292-26995/root/chroot_tmpdir/scmroot/replacer
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-696292-26995/root/chroot_tmpdir/scmroot/replacer'...
$ git fetch origin cd5a46a8d0edca9d81949e247ca33d2033219a5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/replacer
 * [new ref]         cd5a46a8d0edca9d81949e247ca33d2033219a5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd5a46a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild