$ git clone -n https://src.fedoraproject.org/rpms/kf5-kactivities.git /var/lib/mock/f39-build-1503550-34976/root/chroot_tmpdir/scmroot/kf5-kactivities
Cloning into '/var/lib/mock/f39-build-1503550-34976/root/chroot_tmpdir/scmroot/kf5-kactivities'...
$ git fetch origin 5eac58b5a682b03f054e70c210ddf44fbf33c7f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kactivities
 * [new ref]         5eac58b5a682b03f054e70c210ddf44fbf33c7f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eac58b 5.111.0