$ git clone -n https://src.fedoraproject.org/rpms/python-colcon-defaults.git /var/lib/mock/f45-build-29995-642/root/chroot_tmpdir/scmroot/python-colcon-defaults
Cloning into '/var/lib/mock/f45-build-29995-642/root/chroot_tmpdir/scmroot/python-colcon-defaults'...
$ git fetch origin 6fe5d3eddea344dfcc67ad13229b159fe0f0a6f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-colcon-defaults
 * [new ref]         6fe5d3eddea344dfcc67ad13229b159fe0f0a6f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fe5d3e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild