$ git clone -n https://src.fedoraproject.org/rpms/python-nose.git /var/lib/mock/f40-build-2027845-47332/root/chroot_tmpdir/scmroot/python-nose
Cloning into '/var/lib/mock/f40-build-2027845-47332/root/chroot_tmpdir/scmroot/python-nose'...
$ git fetch origin 6c82f02bef40f2728f520b80ed76387e6de450d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nose
 * [new ref]         6c82f02bef40f2728f520b80ed76387e6de450d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c82f02 Don't run 2to3 during package build