$ git clone -n https://src.fedoraproject.org/rpms/renderdoc.git /var/lib/mock/f40-build-800508-143605/root/chroot_tmpdir/scmroot/renderdoc
Cloning into '/var/lib/mock/f40-build-800508-143605/root/chroot_tmpdir/scmroot/renderdoc'...
$ git fetch origin df2a9a73944ac890a5c7ddc83569fa992462ca7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/renderdoc
 * [new ref]         df2a9a73944ac890a5c7ddc83569fa992462ca7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df2a9a7 Update to 1.31 (rhbz#2045957)