$ git clone -n https://src.fedoraproject.org/rpms/python-branca.git /var/lib/mock/f40-build-2383188-60472/root/chroot_tmpdir/scmroot/python-branca
Cloning into '/var/lib/mock/f40-build-2383188-60472/root/chroot_tmpdir/scmroot/python-branca'...
$ git fetch origin 4d8f9a24e8fdd36b59663ba7d83c17accff41835:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-branca
 * [new ref]         4d8f9a24e8fdd36b59663ba7d83c17accff41835 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d8f9a2 Update to latest version (#2261996)