$ git clone -n https://src.fedoraproject.org/rpms/js-jquery.git /var/lib/mock/f40-build-2132988-50813/root/chroot_tmpdir/scmroot/js-jquery
Cloning into '/var/lib/mock/f40-build-2132988-50813/root/chroot_tmpdir/scmroot/js-jquery'...
$ git fetch origin 5b6549904b0551e63ec82d1f4ae53798103e0c24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/js-jquery
 * [new ref]         5b6549904b0551e63ec82d1f4ae53798103e0c24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b65499 Update to 3.7.1