$ git clone -n https://src.fedoraproject.org/rpms/kf5-purpose.git /var/lib/mock/f40-build-760266-121033/root/chroot_tmpdir/scmroot/kf5-purpose
Cloning into '/var/lib/mock/f40-build-760266-121033/root/chroot_tmpdir/scmroot/kf5-purpose'...
$ git fetch origin 05691c418f4c0787e87df9f44e80455c20b4f0c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-purpose
 * [new ref]         05691c418f4c0787e87df9f44e80455c20b4f0c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05691c4 5.113.0