$ git clone -n http://fedora.riscv.rocks:3000/rpms/grpc.git /var/lib/mock/f41-build-834440-158289/root/chroot_tmpdir/scmroot/grpc
Cloning into '/var/lib/mock/f41-build-834440-158289/root/chroot_tmpdir/scmroot/grpc'...
$ git fetch origin af31b22f275e45b10b5544463adb08b10dc2b68c:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/grpc
 * [new ref]         af31b22f275e45b10b5544463adb08b10dc2b68c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af31b22 Add BuildRequires for openssl-devel-engine