$ git clone -n https://src.fedoraproject.org/rpms/initial-setup.git /var/lib/mock/f41-build-side-2-python-2734531-30830/root/chroot_tmpdir/scmroot/initial-setup
Cloning into '/var/lib/mock/f41-build-side-2-python-2734531-30830/root/chroot_tmpdir/scmroot/initial-setup'...
$ git fetch origin 691b0e6f70bd859c84789213c56d334db94ae4ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/initial-setup
 * [new ref]         691b0e6f70bd859c84789213c56d334db94ae4ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 691b0e6 new version