$ git clone -n https://src.fedoraproject.org/rpms/grpc.git /var/lib/mock/f40-build-1236448-22898/root/chroot_tmpdir/scmroot/grpc
Cloning into '/var/lib/mock/f40-build-1236448-22898/root/chroot_tmpdir/scmroot/grpc'...
$ git fetch origin 153fc86619f395ab2507515207e26eeb847f0079:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grpc
 * [new ref]         153fc86619f395ab2507515207e26eeb847f0079 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 153fc86 Rebuild for abseil-cpp-20240116.0