$ git clone -n https://src.fedoraproject.org/rpms/python3-docs.git /var/lib/mock/f42-build-side-1-3503243-45980/root/chroot_tmpdir/scmroot/python3-docs
Cloning into '/var/lib/mock/f42-build-side-1-3503243-45980/root/chroot_tmpdir/scmroot/python3-docs'...
$ git fetch origin 376e463d9850e3545b94eeb8fa379875e79abd65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python3-docs
 * [new ref]         376e463d9850e3545b94eeb8fa379875e79abd65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 376e463 Update to 3.13.3