$ git clone -n https://src.fedoraproject.org/rpms/grpc.git /var/lib/mock/f38-build-side-42-init-devel-1392667-30946/root/chroot_tmpdir/scmroot/grpc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1392667-30946/root/chroot_tmpdir/scmroot/grpc'...
$ git fetch origin 93f876be1b4956da4d16a9f1e1d96a1c8d19076c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grpc
 * [new ref]         93f876be1b4956da4d16a9f1e1d96a1c8d19076c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93f876b Backport fix for CVE-2023-32732 (fix RHBZ#2214470)