$ git clone -n https://src.fedoraproject.org/rpms/python-niaarm.git /var/lib/mock/f40-build-1504156-23883/root/chroot_tmpdir/scmroot/python-niaarm
Cloning into '/var/lib/mock/f40-build-1504156-23883/root/chroot_tmpdir/scmroot/python-niaarm'...
$ git fetch origin 79823d5e53cb7daf223f509158a87bd8a81d19b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaarm
 * [new ref]         79823d5e53cb7daf223f509158a87bd8a81d19b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79823d5 Update to 0.3.10