$ git clone -n https://src.fedoraproject.org/rpms/extra-cmake-modules.git /var/lib/mock/f42-build-side-1-3582695-46886/root/chroot_tmpdir/scmroot/extra-cmake-modules
Cloning into '/var/lib/mock/f42-build-side-1-3582695-46886/root/chroot_tmpdir/scmroot/extra-cmake-modules'...
$ git fetch origin 7cc964e05d10db43defd8d0382c764798d6e98c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/extra-cmake-modules
 * [new ref]         7cc964e05d10db43defd8d0382c764798d6e98c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cc964e 6.16.0