$ git clone -n https://src.fedoraproject.org/rpms/python-niaclass.git /var/lib/mock/f40-build-2648126-66752/root/chroot_tmpdir/scmroot/python-niaclass
Cloning into '/var/lib/mock/f40-build-2648126-66752/root/chroot_tmpdir/scmroot/python-niaclass'...
$ git fetch origin 7fa1849d6513447f92e335cd1e4febf3c59f80d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaclass
 * [new ref]         7fa1849d6513447f92e335cd1e4febf3c59f80d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fa1849 Update to 0.2.0