$ git clone -n https://src.fedoraproject.org/rpms/kf5-kjs.git /var/lib/mock/f40-build-742166-110610/root/chroot_tmpdir/scmroot/kf5-kjs
Cloning into '/var/lib/mock/f40-build-742166-110610/root/chroot_tmpdir/scmroot/kf5-kjs'...
$ git fetch origin 202d423afd4b0cbf14e04dd70220877a9c08b7d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kjs
 * [new ref]         202d423afd4b0cbf14e04dd70220877a9c08b7d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 202d423 5.111.0