$ git clone -n https://src.fedoraproject.org/rpms/fakechroot.git /var/lib/mock/f38-build-side-42-init-devel-718789-27296/root/chroot_tmpdir/scmroot/fakechroot
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-718789-27296/root/chroot_tmpdir/scmroot/fakechroot'...
$ git fetch origin bb4b85a8d37d38236bd3df0140359a9609c742d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fakechroot
 * [new ref]         bb4b85a8d37d38236bd3df0140359a9609c742d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb4b85a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild