$ git clone -n https://src.fedoraproject.org/rpms/libkscreen.git /var/lib/mock/f42-bootstrap-3533728-46421/root/chroot_tmpdir/scmroot/libkscreen
Cloning into '/var/lib/mock/f42-bootstrap-3533728-46421/root/chroot_tmpdir/scmroot/libkscreen'...
$ git fetch origin 30c8b5d238b4ae05bb61fa825d45f2041071907c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkscreen
 * [new ref]         30c8b5d238b4ae05bb61fa825d45f2041071907c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30c8b5d 6.3.5