$ git clone -n https://src.fedoraproject.org/rpms/perl-JSON-RPC-Common.git /var/lib/mock/f41-build-side-1-2781539-32531/root/chroot_tmpdir/scmroot/perl-JSON-RPC-Common
Cloning into '/var/lib/mock/f41-build-side-1-2781539-32531/root/chroot_tmpdir/scmroot/perl-JSON-RPC-Common'...
$ git fetch origin e5a2e51d2df52e0af932fabcfaa0534769f36531:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-JSON-RPC-Common
 * [new ref]         e5a2e51d2df52e0af932fabcfaa0534769f36531 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5a2e51 convert GPL+ or Artistic license to SPDX