$ git clone -n https://src.fedoraproject.org/rpms/reproc.git /var/lib/mock/f38-build-side-42-init-devel-735302-27633/root/chroot_tmpdir/scmroot/reproc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-735302-27633/root/chroot_tmpdir/scmroot/reproc'...
$ git fetch origin e89c95954bdd015cc959975ee1e8e83a365939ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reproc
 * [new ref]         e89c95954bdd015cc959975ee1e8e83a365939ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e89c959 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild