$ git clone -n https://src.fedoraproject.org/rpms/objfw.git /var/lib/mock/f39-build-2269216-54763/root/chroot_tmpdir/scmroot/objfw
Cloning into '/var/lib/mock/f39-build-2269216-54763/root/chroot_tmpdir/scmroot/objfw'...
$ git fetch origin 0febcc4faf67005ae077c50772a12300367a10f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/objfw
 * [new ref]         0febcc4faf67005ae077c50772a12300367a10f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0febcc4 Update to 1.0.6