$ git clone -n https://src.fedoraproject.org/rpms/jctools.git /var/lib/mock/f41-build-1228449-22831/root/chroot_tmpdir/scmroot/jctools
Cloning into '/var/lib/mock/f41-build-1228449-22831/root/chroot_tmpdir/scmroot/jctools'...
$ git fetch origin 0b27c5d17543a30c09b26eb2d40770d07a8b83f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jctools
 * [new ref]         0b27c5d17543a30c09b26eb2d40770d07a8b83f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b27c5d Extract smoke tests out of test plan