$ git clone -n https://src.fedoraproject.org/rpms/collectd.git /var/lib/mock/f38-build-side-42-init-devel-566372-25898/root/chroot_tmpdir/scmroot/collectd
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-566372-25898/root/chroot_tmpdir/scmroot/collectd'...
$ git fetch origin de59caff5c75004362bf829c12f8f0369aba775e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/collectd
 * [new ref]         de59caff5c75004362bf829c12f8f0369aba775e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de59caf rebuild for new libgps