$ git clone -n https://src.fedoraproject.org/rpms/extra-cmake-modules.git /var/lib/mock/f42-build-side-1-3568061-46743/root/chroot_tmpdir/scmroot/extra-cmake-modules
Cloning into '/var/lib/mock/f42-build-side-1-3568061-46743/root/chroot_tmpdir/scmroot/extra-cmake-modules'...
$ git fetch origin 9d7741ba72deae88b3342514968a95918db1d794:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/extra-cmake-modules
 * [new ref]         9d7741ba72deae88b3342514968a95918db1d794 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d7741b Uploading sources